Subjects -> PHYSICS (Total: 857 journals)
    - ELECTRICITY AND MAGNETISM (10 journals)
    - MECHANICS (22 journals)
    - NUCLEAR PHYSICS (53 journals)
    - OPTICS (92 journals)
    - PHYSICS (625 journals)
    - SOUND (25 journals)
    - THERMODYNAMICS (30 journals)

PHYSICS (625 journals)            First | 1 2 3 4 | Last

Showing 201 - 400 of 741 Journals sorted alphabetically
International Journal of Astronomy and Astrophysics     Open Access   (Followers: 36)
International Journal of Biological, Physical and Chemical Studies     Open Access  
International Journal of Computational Materials Science and Surface Engineering     Hybrid Journal   (Followers: 7)
International Journal of Damage Mechanics     Hybrid Journal   (Followers: 5)
International Journal of Engineering and Applied Physics     Open Access  
International Journal of Fatigue     Hybrid Journal   (Followers: 41)
International Journal of Fracture     Hybrid Journal   (Followers: 14)
International Journal of Geometric Methods in Modern Physics     Hybrid Journal   (Followers: 2)
International Journal of Geophysics     Open Access   (Followers: 5)
International Journal of Heat and Fluid Flow     Hybrid Journal   (Followers: 41)
International Journal of Low Radiation     Hybrid Journal  
International Journal of Low-Carbon Technologies     Open Access   (Followers: 1)
International Journal of Mass Spectrometry     Hybrid Journal   (Followers: 17)
International Journal of Material Forming     Hybrid Journal   (Followers: 1)
International Journal of Materials and Product Technology     Hybrid Journal   (Followers: 2)
International Journal of Mechanical Sciences     Hybrid Journal   (Followers: 14)
International Journal of Mechanics and Materials in Design     Hybrid Journal   (Followers: 7)
International Journal of Medical Physics, Clinical Engineering and Radiation Oncology     Open Access   (Followers: 11)
International Journal of Microstructure and Materials Properties     Hybrid Journal   (Followers: 7)
International Journal of Microwave Science and Technology     Open Access   (Followers: 12)
International Journal of Modeling, Simulation, and Scientific Computing     Hybrid Journal   (Followers: 3)
International Journal of Modern Physics A     Hybrid Journal   (Followers: 15)
International Journal of Modern Physics B     Hybrid Journal   (Followers: 12)
International Journal of Modern Physics C     Hybrid Journal   (Followers: 14)
International Journal of Modern Physics D     Hybrid Journal   (Followers: 13)
International Journal of Modern Physics E     Hybrid Journal   (Followers: 13)
International Journal of Multiphysics     Open Access  
International Journal of Nanomanufacturing     Hybrid Journal  
International Journal of Nanoscience     Hybrid Journal  
International Journal of Nanotechnology     Hybrid Journal   (Followers: 9)
International Journal of Non-Linear Mechanics     Hybrid Journal   (Followers: 8)
International Journal of Nonlinear Dynamics and Control     Hybrid Journal   (Followers: 6)
International Journal of Physics     Open Access   (Followers: 10)
International Journal of PIXE     Hybrid Journal  
International Journal of Plasticity     Hybrid Journal   (Followers: 7)
International Journal of Quantum Information     Hybrid Journal   (Followers: 6)
International Journal of Self-Propagating High-Temperature Synthesis     Hybrid Journal  
International Journal of Solids and Structures     Hybrid Journal   (Followers: 14)
International Journal of Surface Science and Engineering     Hybrid Journal   (Followers: 6)
International Journal of Theoretical and Applied Multiscale Mechanics     Hybrid Journal   (Followers: 3)
International Journal of Theoretical and Mathematical Physics     Open Access   (Followers: 13)
International Journal of Theoretical Physics     Hybrid Journal   (Followers: 17)
International Journal of Thermal Sciences     Hybrid Journal   (Followers: 18)
International Journal on Smart Sensing and Intelligent Systems     Open Access  
International Letters of Chemistry, Physics and Astronomy     Open Access   (Followers: 8)
International Materials Reviews     Hybrid Journal   (Followers: 15)
Iranian Journal of Medical Physics     Open Access  
Iranian Journal of Science and Technology, Transactions A : Science     Hybrid Journal  
Ironmaking & Steelmaking     Hybrid Journal   (Followers: 4)
Izvestiya, Atmospheric and Oceanic Physics     Full-text available via subscription   (Followers: 1)
Izvestiya, Physics of the Solid Earth     Hybrid Journal   (Followers: 2)
Jambura Physics Journal     Open Access  
JETP Letters     Hybrid Journal   (Followers: 3)
Journal of Adhesion Science and Technology     Hybrid Journal   (Followers: 10)
Journal of Advanced Physics     Full-text available via subscription   (Followers: 13)
Journal of Advances in Physics     Open Access   (Followers: 13)
Journal of Applied Mathematics and Physics     Open Access   (Followers: 9)
Journal of Applied Mechanics and Technical Physics     Hybrid Journal   (Followers: 7)
Journal of Applied Physics     Hybrid Journal   (Followers: 69)
Journal of Applied Spectroscopy     Hybrid Journal   (Followers: 9)
Journal of Astrophysics     Open Access   (Followers: 33)
Journal of Astrophysics and Astronomy     Open Access   (Followers: 58)
Journal of Building Physics     Hybrid Journal   (Followers: 1)
Journal of Chromatographic Science     Hybrid Journal   (Followers: 15)
Journal of Complex Networks     Hybrid Journal   (Followers: 1)
Journal of Composite Materials     Hybrid Journal   (Followers: 244)
Journal of Computational and Theoretical Transport     Hybrid Journal   (Followers: 2)
Journal of Computational Methods in Physics     Open Access   (Followers: 8)
Journal of Computational Physics     Hybrid Journal   (Followers: 59)
Journal of Computational Physics : X     Open Access   (Followers: 1)
Journal of Contemporary Physics (Armenian Academy of Sciences)     Hybrid Journal   (Followers: 9)
Journal of Dynamic Systems, Measurement, and Control     Full-text available via subscription   (Followers: 14)
Journal of Elasticity     Hybrid Journal   (Followers: 7)
Journal of Electron Spectroscopy and Related Phenomena     Hybrid Journal   (Followers: 3)
Journal of Electronic Materials     Hybrid Journal   (Followers: 3)
Journal of Electronics Cooling and Thermal Control     Open Access   (Followers: 9)
Journal of Engineering Materials and Technology     Full-text available via subscription   (Followers: 17)
Journal of Engineering Physics and Thermophysics     Hybrid Journal   (Followers: 2)
Journal of Experimental and Theoretical Physics     Hybrid Journal   (Followers: 4)
Journal of Experimental Physics     Open Access   (Followers: 3)
Journal of Fire Sciences     Hybrid Journal   (Followers: 6)
Journal of Geometry and Physics     Full-text available via subscription   (Followers: 2)
Journal of Geophysical Research : Space Physics     Full-text available via subscription   (Followers: 136)
Journal of Gravity     Open Access   (Followers: 4)
Journal of High Energy Astrophysics     Full-text available via subscription   (Followers: 25)
Journal of High Energy Physics     Hybrid Journal   (Followers: 17)
Journal of High Energy Physics, Gravitation and Cosmology     Open Access   (Followers: 2)
Journal of Hydrogels     Full-text available via subscription  
Journal of Hyperspectral Remote Sensing     Open Access   (Followers: 23)
Journal of Imaging     Open Access   (Followers: 3)
Journal of Information Display     Open Access   (Followers: 1)
Journal of Intelligent Material Systems and Structures     Hybrid Journal   (Followers: 8)
Journal of Lightwave Technology     Hybrid Journal   (Followers: 14)
Journal of Low Frequency Noise, Vibration and Active Control     Open Access   (Followers: 8)
Journal of Luminescence     Hybrid Journal   (Followers: 2)
Journal of Materials Engineering and Performance     Hybrid Journal   (Followers: 22)
Journal of Materials Physics and Chemistry     Open Access   (Followers: 7)
Journal of Materials Science     Hybrid Journal   (Followers: 25)
Journal of Materials Science : Materials in Electronics     Hybrid Journal   (Followers: 2)
Journal of Materials Science : Materials in Medicine     Hybrid Journal   (Followers: 1)
Journal of Mathematical Fluid Mechanics     Hybrid Journal   (Followers: 10)
Journal of Mathematical Physics     Hybrid Journal   (Followers: 25)
Journal of Medical Imaging and Health Informatics     Full-text available via subscription  
Journal of Medical Ultrasonics     Hybrid Journal   (Followers: 2)
Journal of Micro/Nanolithography MEMS and MOEMS     Hybrid Journal   (Followers: 24)
Journal of Molecular Spectroscopy     Hybrid Journal   (Followers: 6)
Journal of Motor Behavior     Hybrid Journal   (Followers: 8)
Journal of Multiscale Modeling     Hybrid Journal   (Followers: 1)
Journal of Nepal Physical Society     Open Access  
Journal of Nondestructive Evaluation     Hybrid Journal   (Followers: 11)
Journal of Nonlinear Dynamics     Open Access   (Followers: 6)
Journal of Nonlinear Mathematical Physics     Hybrid Journal   (Followers: 2)
Journal of Nuclear Physics, Material Sciences, Radiation and Applications     Open Access   (Followers: 6)
Journal of Optics     Hybrid Journal   (Followers: 17)
Journal of Photonics for Energy     Hybrid Journal   (Followers: 2)
Journal of Physical and Chemical Reference Data     Hybrid Journal   (Followers: 4)
Journal of Physical Chemistry B     Hybrid Journal   (Followers: 48)
Journal of Physical Chemistry C     Hybrid Journal   (Followers: 36)
Journal of Physical Oceanography     Hybrid Journal   (Followers: 18, SJR: 2.461, CiteScore: 3)
Journal of Physical Organic Chemistry     Hybrid Journal   (Followers: 8)
Journal of Physics and Chemistry of Solids     Hybrid Journal   (Followers: 3)
Journal of Plasma Physics     Hybrid Journal   (Followers: 21)
Journal of Polymer Science Part B: Polymer Physics     Hybrid Journal   (Followers: 22)
Journal of Porous Materials     Hybrid Journal   (Followers: 4)
Journal of Porphyrins and Phthalocyanines     Hybrid Journal   (Followers: 1)
Journal of Quantitative Spectroscopy and Radiative Transfer     Hybrid Journal   (Followers: 3)
Journal of Reinforced Plastics and Composites     Hybrid Journal   (Followers: 30)
Journal of Rheology     Full-text available via subscription   (Followers: 7)
Journal of Sandwich Structures and Materials     Hybrid Journal   (Followers: 4)
Journal of Scientific Research     Open Access  
Journal of Sensors     Open Access   (Followers: 25)
Journal of Sol-Gel Science and Technology     Hybrid Journal  
Journal of Solid State Physics     Open Access   (Followers: 8)
Journal of Spectroscopy     Open Access   (Followers: 6)
Journal of Superconductivity and Novel Magnetism     Partially Free   (Followers: 1)
Journal of Synchrotron Radiation     Open Access   (Followers: 3)
Journal of the American Society for Mass Spectrometry     Hybrid Journal   (Followers: 32)
Journal of the ICRU     Hybrid Journal  
Journal of the Korean Physical Society     Partially Free  
Journal of the Physical Society of Japan     Hybrid Journal   (Followers: 2)
Journal of Theoretical and Applied Physics     Open Access   (Followers: 9)
Journal of Tissue Engineering     Open Access   (Followers: 6)
Journal of Ultrasound in Medicine     Full-text available via subscription   (Followers: 11)
Journal of Vibration and Control     Hybrid Journal   (Followers: 42)
Journal of Visualization     Hybrid Journal   (Followers: 3)
Journal of Zhejiang University : Sceince A     Hybrid Journal  
JPSE (Journal of Physical Science and Engineering)     Open Access  
Jurnal Fisika     Open Access  
Jurnal Ilmiah Pendidikan Fisika Al-Biruni     Open Access  
Jurnal NEUTRINO     Open Access  
Jurnal Online of Physics     Open Access  
Jurnal Pendidikan Fisika Indonesia (Indonesian Journal of Physics Education)     Open Access  
Jurnal Penelitian Fisika dan Aplikasinya     Open Access  
Jurnal Penelitian Sains (JPS)     Open Access  
Karbala International Journal of Modern Science     Open Access  
Kasuari : Physics Education Journal     Open Access  
La Rivista del Nuovo Cimento     Hybrid Journal  
Lasers in Surgery and Medicine     Hybrid Journal   (Followers: 1)
Latvian Journal of Physics and Technical Sciences     Open Access  
Letters in High Energy Physics     Open Access  
Letters in Mathematical Physics     Hybrid Journal   (Followers: 4)
Light : Science & Applications     Open Access   (Followers: 3)
Living Reviews in Computational Astrophysics     Open Access   (Followers: 3)
Living Reviews in Relativity     Open Access  
Living Reviews in Solar Physics     Open Access   (Followers: 1)
Lubrication Science     Hybrid Journal   (Followers: 2)
Macalester Journal of Physics and Astronomy     Open Access   (Followers: 5)
Machining Science and Technology: An International Journal     Hybrid Journal   (Followers: 2)
Magnetic Resonance     Open Access  
Magnetic Resonance Letters     Open Access  
Magnetic Resonance Materials in Physics, Biology and Medicine     Hybrid Journal   (Followers: 3)
MAPAN     Hybrid Journal  
Mass Spectrometry Reviews     Hybrid Journal   (Followers: 31)
Matéria (Rio de Janeiro)     Open Access  
Materials and Design     Open Access   (Followers: 47)
Materials at High Temperatures     Full-text available via subscription   (Followers: 3)
Materials Chemistry and Physics     Full-text available via subscription   (Followers: 15)
Materials Research Bulletin     Hybrid Journal   (Followers: 25)
Materials Research Innovations     Hybrid Journal   (Followers: 1)
Materials Science     Hybrid Journal   (Followers: 7)
Materials Science and Engineering: A     Hybrid Journal   (Followers: 44)
Materials Science and Engineering: B     Hybrid Journal   (Followers: 22)
Materials Science and Engineering: R: Reports     Hybrid Journal   (Followers: 15)
Materials Science and Technology     Hybrid Journal   (Followers: 40)
Materials Today Physics     Hybrid Journal   (Followers: 1)
Matériaux & Techniques     Full-text available via subscription   (Followers: 2)
Mathematical Physics, Analysis and Geometry     Hybrid Journal   (Followers: 3)
Mathematics and Mechanics of Solids     Hybrid Journal   (Followers: 3)
Matter and Radiation at Extremes     Open Access   (Followers: 1)
Meccanica     Hybrid Journal   (Followers: 1)
Mechanics of Advanced Materials and Structures     Hybrid Journal   (Followers: 6)
Mechanics of Materials     Hybrid Journal   (Followers: 25)
Mechanics of Time-Dependent Materials     Hybrid Journal   (Followers: 2)
Mechanics Research Communications     Hybrid Journal   (Followers: 4)
Medical Physics     Hybrid Journal   (Followers: 17)
Micro and Nano Systems Letters     Open Access   (Followers: 6)
Microfluidics and Nanofluidics     Hybrid Journal   (Followers: 11)
Microporous and Mesoporous Materials     Hybrid Journal   (Followers: 9)
Modern Instrumentation     Open Access   (Followers: 57)
Modern Physics Letters A     Hybrid Journal   (Followers: 14)

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Similar Journals
Journal Cover
International Journal of Modern Physics A
Journal Prestige (SJR): 0.72
Citation Impact (citeScore): 1
Number of Followers: 15  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 0217-751X - ISSN (Online) 1793-656X
Published by World Scientific Homepage  [120 journals]
  • Maximally chaotic dynamical systems of Anosov–Kolmogorov and
           fundamental interactions

    • Free pre-print version: Loading...

      Authors: George Savvidy
      Abstract: International Journal of Modern Physics A, Volume 37, Issue 09, 30 March 2022.
      In this paper, we give a general review on the application of ergodic theory to the investigation of dynamics of the Yang–Mills gauge fields and of the gravitational systems, as well as its application in the Monte Carlo method and fluid dynamics. In ergodic theory the maximally chaotic dynamical systems (MCDS) can be defined as dynamical systems that have nonzero Kolmogorov entropy. The hyperbolic dynamical systems that fulfill the Anosov C-condition belong to the MCDS insofar as they have exponential instability of their phase trajectories and positive Kolmogorov entropy. It follows that the C-condition defines a rich class of MCDS that span over an open set in the space of all dynamical systems. The large class of Anosov–Kolmogorov MCDS is realized on Riemannian manifolds of negative sectional curvatures and on high-dimensional tori. The interest in MCDS is rooted in the attempts to understand the relaxation phenomena, the foundations of the statistical mechanics, the appearance of turbulence in fluid dynamics, the nonlinear dynamics of Yang–Mills field and gravitating [math]-body systems as well as black hole thermodynamics. Our aim is to investigate classical- and quantum-mechanical properties of MCDS and their role in the theory of fundamental interactions.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-12T07:00:00Z
      DOI: 10.1142/S0217751X22300010
      Issue No: Vol. 37, No. 09 (2022)
       
  • Thermodynamics of a modified Schwarzschild white hole in the presence of a
           cosmological constant

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      Authors: Amos S. Kubeka, Alireza Amani
      Abstract: International Journal of Modern Physics A, Volume 37, Issue 09, 30 March 2022.
      In this paper, we modify the usual Schwarzschild white hole in the presence of the cosmological constant. We then study its [math] criticality, heat capacity, derive its equation of state, and then its stability conditions. In the process, we find that the thermal properties of the modified Schwarzschild white hole are not that of the usual Schwarzschild white hole as first stated in the literature by Stephen Hawking and then confirmed by others, but in fact, they are analogous to the thermal properties of our the universe.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-12T07:00:00Z
      DOI: 10.1142/S0217751X22500397
      Issue No: Vol. 37, No. 09 (2022)
       
  • Cosmic inflation of generalized Starobinsky model in [math] gravity

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      Authors: Younes Younesizadeh, Asghar Rezaie
      Abstract: International Journal of Modern Physics A, Volume 37, Issue 09, 30 March 2022.
      In this paper, we investigate the inflationary cosmology in [math] gravity by proposing different models of [math], where [math] is a noninteracting massive scalar field which is nonminimally coupled to gravity in the Jordan frame. In special cases of these models, we could reach the standard Starobinsky model. Further, we calculated the slow-roll parameters, scalar-to-tensor ratio, and spectral index for these models and compared them with observations. Our findings are located in the favorite area of Planck’s recent results. On the other hand, the discovery of the gravitational waves in the range of [math] would rule out the Starobinsky model or even the nondiscovery of gravitational wave in this range [math] by PICO. Our models, specifically the second one, might be the proper generalization for the Starobinsky model in this regard.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-12T07:00:00Z
      DOI: 10.1142/S0217751X22500403
      Issue No: Vol. 37, No. 09 (2022)
       
  • Imprints of new physics in [math] decay in nonuniversal [math] model

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      Authors: S. Biswas, S. Mahata, B. P. Nayak, S. Sahoo
      Abstract: International Journal of Modern Physics A, Volume 37, Issue 09, 30 March 2022.
      Inspired by various updated tantalizing results of LHCb on baryonic sector we study the [math] decay in nonuniversal [math] model. We present the fourfold angular distributions of the decay in terms of transversity amplitudes. We structure the observables: differential branching ratio, lepton side forward–backward asymmetries and polarization fractions in terms of the transversity amplitudes and incorporate the new physics (NP) terms in it. We reduce the number of the form factors using the improved Isgur–Wise relations. We study the observables in the Standard Model (SM) as well as in nonuniversal [math] model. The predicted values are very interesting for the high energy physics community and results might provide prominent footprints of NP.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-12T07:00:00Z
      DOI: 10.1142/S0217751X22500440
      Issue No: Vol. 37, No. 09 (2022)
       
  • Novel hairy black hole solutions in
           Einstein–Maxwell–Gauss–Bonnet-scalar theory

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      Authors: Callum L. Hunter, Douglas J. Smith
      Abstract: International Journal of Modern Physics A, Volume 37, Issue 09, 30 March 2022.
      It has been previously shown that a Gauss–Bonnet term nonminimally coupled to a scalar field produces a scalarised black hole solution which can be considered as having secondary scalar hair, parametrised in terms of the black hole’s mass and charge. In this paper we extend a previously investigated linear coupling of the form [math] to a nonminimally coupled Maxwell term, with the form [math]. By using numerical methods the solutions to the full differential equations are found, as well as a perturbative expansion in the [math] limit and a perturbative expansion in couplings parameters such as [math]. These solutions describe scalarised black holes with modified electric field which have dependence not only on the electric charge of the black hole, but also the value of the nonminimal coupling constant. We also discuss the bounds imposed on the parameters of the black hole by the reality condition of the solution, giving some explicit numerical bounds.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-12T07:00:00Z
      DOI: 10.1142/S0217751X22500452
      Issue No: Vol. 37, No. 09 (2022)
       
  • Topological effects of a disclination on quantum revivals

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      Authors: K. Bakke
      Abstract: International Journal of Modern Physics A, Volume 37, Issue 09, 30 March 2022.
      In this paper, we discuss the effects of the topology of a disclination on quantum revivals when a quantum particle is subject to an infinite cylindrical well and a logarithmic potential. By using the WKB (Wentzel, Kramers and Brillouin) approximation, we obtain the eigenvalues of energy and show that the influence of the topology of the disclination on them gives rise to an Aharonov–Bohm-type effect. Further, we discuss how the topology of a disclination influences the classical periods and the revival times.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-12T07:00:00Z
      DOI: 10.1142/S0217751X22500464
      Issue No: Vol. 37, No. 09 (2022)
       
  • [math] symmetry in [math] gauge theories

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      Authors: Minati Biswal, Sanatan Digal, Vinod Mamale, Sabiar Shaikh
      Abstract: International Journal of Modern Physics A, Volume 37, Issue 09, 30 March 2022.
      In this paper, we study [math] symmetry of [math] gauge group, in one-dimensional gauged chain. The action can be obtained by considering the terms of a [math]-dimensional Euclidean lattice action of a [math] gauge theory that break the [math] symmetry explicitly. The matter fields in the resulting partition function can be integrated out exactly, for a given background of link variables, to calculate the Polyakov loop free energy. To keep the temperature fixed, the lattice spacing is scaled appropriately as the number of “temporal” sites is varied. In the case of Higgs as matter field, the Polyakov loop free energy exhibits the [math] symmetry in the limit of large number of temporal sites. For fermions, the strength of [math] explicit breaking decreases for finer lattices, but approaches a nonzero value in the same limit. We discuss the possible implications of these results to [math] gauge theories in [math] dimensions.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-12T07:00:00Z
      DOI: 10.1142/S0217751X22500476
      Issue No: Vol. 37, No. 09 (2022)
       
  • Hadron-quark phase transition at finite density in the presence of a
           magnetic field: Anisotropic approach

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      Authors: E. J. Ferrer, A. Hackebill
      Abstract: International Journal of Modern Physics A, Volume 37, Issue 09, 30 March 2022.
      We investigate the hadron-quark phase transition at finite density in the presence of a magnetic field taking into account the anisotropy created by a uniform magnetic field in the system’s equations of state. We find a new anisotropic equilibrium condition that will drive the first-order phase transition along the boundary between the two phases. Fixing the magnetic field in the hadronic phase, the phase transition is realized by increasing the baryonic chemical potential at zero-temperature. It is shown that the magnetic field is mildly boosted after the system transitions from the hadronic to the quark phase. The magnetic-field discontinuity between the two phases is supported by a surface density of magnetic monopoles, which accumulate at the boundary separating the two phases. The mechanism responsible for the monopole charge density generation is discussed. Each phase is found to be paramagnetic with higher magnetic susceptibility in the quark phase. The connection with the physics of neutron stars is highlighted throughout the paper.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-12T07:00:00Z
      DOI: 10.1142/S0217751X22500488
      Issue No: Vol. 37, No. 09 (2022)
       
  • Rotating Lee–Wick black hole and thermodynamics

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      Authors: Dharm Veer Singh, Sudhaker Upadhyay, Md Sabir Ali
      Abstract: International Journal of Modern Physics A, Volume 37, Issue 09, 30 March 2022.
      We derive a singular solution for the rotating counterpart of Lee–Wick gravity having a point source in a higher-derivative theory. We critically analyze the thermodynamics of such a thermal system by evaluating mass parameters, angular velocity and Hawking temperature. The system follows the first law of thermodynamics and leads to the expression of entropy. We further discuss the stability and phase transition of the theory by evaluating heat capacity and free energy. The phase transition occurs at the point of divergence and the temperature is maximum. Remarkably, the black hole is unstable for a small horizon radius and stable for a large horizon radius.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-12T07:00:00Z
      DOI: 10.1142/S0217751X2250049X
      Issue No: Vol. 37, No. 09 (2022)
       
  • [math] model on regions with boundary

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      Authors: A. Pikalov
      Abstract: International Journal of Modern Physics A, Volume 37, Issue 09, 30 March 2022.
      In this paper, we discuss the [math] model in large [math] limit in saddle point approximation on disk and annulus with various combinations of Dirichlet and Neumann boundary conditions. We show that homogeneous condensate is not a saddle point in any of considered cases. Behavior of inhomogeneous condensate near boundary is analyzed. The condensate diverges at boundary in case of Dirichlet or Neumann boundary conditions but can be finite in case of mixed conditions.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-12T07:00:00Z
      DOI: 10.1142/S0217751X22500506
      Issue No: Vol. 37, No. 09 (2022)
       
  • The upgrade of the CMS electromagnetic calorimeter: Future prospects for
           precision timing and energy measurements at the HL-LHC

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      Authors: Cristina Biino
      Abstract: International Journal of Modern Physics A, Ahead of Print.
      The Compact Muon Solenoid (CMS) electromagnetic calorimeter (ECAL) is a high granularity lead tungstate crystal calorimeter operated at the CERN LHC. The future High Luminosity upgrade of the LHC will provide unprecedented instantaneous and integrated luminosity with up to 200 collisions per bunch-crossing [pileup (PU)]. The CMS detector is therefore undergoing an extensive upgrade program to prepare for these demanding conditions. In the ECAL barrel region, the crystals will continue to perform well. The Avalanche Photodiodes (APDs) detecting the scintillation light will also continue to be operational, with some increase in noise that will be mitigated by reducing the operational temperature. Nonetheless, the entire readout and trigger electronics will need to be replaced to cope with the harsh conditions and increased trigger latency requirements. We plan a 25-fold improved readout granularity and a factor 4 sampling rate increase. The timing precision is used in important physics measurements and it is speculated that further improved time information could be exploited for PU mitigation and for the photons assignment to the correct collision vertex. As presented in this paper the endcaps region calorimeter needs to be replaced due to irrecoverable radiation damage of the crystals in the forward region. The upgraded ECAL will preserve the energy resolution, and will improve on time resolution for photons and electrons. In this paper, the ongoing R&D activities for the ECAL barrel readout electronics upgrade are presented.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-20T07:00:00Z
      DOI: 10.1142/S0217751X22400073
       
  • Problems in measuring the Casimir forces at short separations

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      Authors: George Palasantzas, Vitaly B. Svetovoy
      Abstract: International Journal of Modern Physics A, Ahead of Print.
      The Casimir forces induced by fluctuations of electromagnetic field have been measured with a high precision at distances above [math] nm. Although at shorter separations the magnitude of the force increases, it is more complicated to measure the forces at distances below [math] nm. We review the problems that appear in this range of distances and their possible solutions. The first problem is related to the pull-in instability that occurs when two surfaces get too close to each other. As a particular manifestation of this problem, the spontaneous formation of the capillary bridges at distances [math] nm is discussed. As an alternative, we discuss the method of adhered cantilever, which does not suffer from the pull-in instability. The second problem is related to the roughness of interacting surfaces that gives a significant deviation of the force from the expected scaling with the distance. We explain how the deviation can be related to the contribution of high asperities to the force. Characterization of the deposited rough films is also covered with a special emphasis on the excessive number of high asperities for the films deposited under nonequilibrium conditions. The third problem is related to the poor precision in the determination of the absolute distance between the bodies that results in a large total error in the force. We discuss the methods to determine the distance upon contact and cover a proposition to improve this precision in the method of adhered cantilever.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-20T07:00:00Z
      DOI: 10.1142/S0217751X22410019
       
  • Current status of the problem of thermal Casimir force

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      Authors: G. L. Klimchitskaya, V. M. Mostepanenko
      Abstract: International Journal of Modern Physics A, Ahead of Print.
      The problem of thermal Casimir force, which consists in disagreement of theoretical predictions of the fundamental Lifshitz theory with the measurement data of high precision experiments and some peculiar properties of the Casimir entropy, is reviewed. We discuss different approaches to the resolution of this problem proposed in the literature during the last 20 years. Particular attention is given to the role of the effects of spatial dispersion. The recently suggested nonlocal Drude-like permittivities which take proper account of the dissipation of conduction electrons and bring the predictions of the Lifshitz theory in agreement with experiment and requirements of thermodynamics are considered. The prospects of this approach in the ultimate resolution of the problem of thermal Casimir force are evaluated.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-20T07:00:00Z
      DOI: 10.1142/S0217751X22410020
       
  • The Casimir effect in graphene systems: Experiment and theory

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      Authors: G. L. Klimchitskaya, U. Mohideen, V. M. Mostepanenko
      Abstract: International Journal of Modern Physics A, Ahead of Print.
      The Casimir effect in graphene systems is reviewed with a emphasis made on the large thermal correction to the Casimir force predicted at short separations between the test bodies. The computational results for the Casimir pressure and for the thermal correction are presented for both pristine graphene and real graphene sheets, which possess nonzero energy gap and chemical potential, obtained by means of exact polarization tensor. Two experiments on measuring the gradient of the Casimir force between an Au-coated sphere and graphene-coated substrates performed by using a modified atomic force microscope cantilever-based technique are described. It is shown that the measurement data of both experiments are in agreement with theoretical predictions of the Lifshitz theory using the polarization tensor. Additionally, several important improvements made in the second experiment, allowed to demonstrate the predicted large thermal effect in the Casimir interaction at short separations. Possible implications of this result to the resolution of long-term problems of Casimir physics are discussed.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-20T07:00:00Z
      DOI: 10.1142/S0217751X22410032
       
  • Universal Casimir interactions in the sphere–sphere geometry

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      Authors: Tanja Schoger, Benjamin Spreng, Gert-Ludwig Ingold, Astrid Lambrecht, Paulo A. Maia Neto, Serge Reynaud
      Abstract: International Journal of Modern Physics A, Ahead of Print.
      We study universal Casimir interactions in two configurations which appear as dual to each other. The first involves spheres described by the Drude model and separated by vacuum while the second involves dielectric spheres immersed in a salted solution at distances larger than the Debye screening length. In both cases, the long-distance limit, equivalently the high-temperature limit, is dominated by the effect of low-frequency transverse magnetic thermal fluctuations. They are independent of the details of dielectric functions of materials, due to the finite conductivity of metals in the former case and of salted water in the latter one. They also show universality properties in their dependence on geometric dimensions in relation to an approximate conformal invariance of the reduced free energy.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-20T07:00:00Z
      DOI: 10.1142/S0217751X22410056
       
  • Casimir cosmology

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      Authors: Ulf Leonhardt
      Abstract: International Journal of Modern Physics A, Ahead of Print.
      In 1998, astronomers discovered that the expansion of the universe is accelerating. Somehow, something must have made gravity repulsive on cosmological scales. This something was called dark energy; it is described by Einstein’s cosmological constant; and it amounts to about 70% of the total mass of the universe. It has been conjectured that the cosmological constant is a form of vacuum energy, but its prediction from quantum field theory has failed by many orders of magnitude, until recently. Informed by empirical evidence on Casimir forces, Lifshitz theory has not only produced the correct order of magnitude, but is quantitatively consistent with the astronomical data. Moreover, the theory appears to resolve the tension between the measured and the predicted Hubble constant. There is therefore a good chance that Casimir physics explains dark energy. This paper introduces cosmology for practitioners of vacuum forces as part of “The State of the Quantum Vacuum: Casimir Physics in the 2020s” edited by K. A. Milton. It may also be interesting for other physicists and engineers who wish to have a concise introduction to cosmology.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-20T07:00:00Z
      DOI: 10.1142/S0217751X22410068
       
  • Vacuum energy density and pressure inside a soft wall

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      Authors: Agam Shayit, S. A. Fulling, T. E. Settlemyre, Joseph Merritt
      Abstract: International Journal of Modern Physics A, Ahead of Print.
      In the study of quantum vacuum energy and the Casimir effect, it is desirable to model the conductor by a potential of the form [math]. This “soft wall” model was proposed so as to avoid the violation of the principle of virtual work under ultraviolet regularization that occurs for the standard Dirichlet wall. The model was formalized for a massless scalar field, and the expectation value of the stress tensor has been expressed in terms of the reduced Green function of the equation of motion. In the limit of interest, [math], which approximates a Dirichlet wall, a closed-form expression for the reduced Green function cannot be found, so piecewise approximations incorporating the perturbative and WKB expansions of the Green function, along with interpolating splines in the region where neither expansion is valid, have been developed. After reviewing this program, in this paper, we apply the scheme to the wall with [math] and use it to compute the renormalized energy density and pressure inside the cavity for various values of the conformal parameter. The consistency of the results is verified by comparison to their numerical counterparts and verification of the trace anomaly and the conservation law. Finally, we use the approximation scheme to reproduce the energy density inside the quadratic wall, which was previously calculated exactly but with some uncertainty.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-20T07:00:00Z
      DOI: 10.1142/S0217751X2241007X
       
  • Quantum vacuum phenomena in various backgrounds

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      Authors: Antonino Flachi
      Abstract: International Journal of Modern Physics A, Ahead of Print.
      In this paper, we will review, through various examples, some ideas connecting the physics of the quantum vacuum and the Casimir effect with the mechanism of symmetry breaking in different backgrounds. In the first example, we will discuss how the quantum vacuum energy is altered by the presence of nonlinearities in the underlying quantum field theory in a way that depends on the spatial dimensionality, as dictated by the Mermin–Wagner–Hohenberg–Coleman theorem. In the second example, we will explore how the combination of boundary effects and (discrete) chiral symmetry breaking can affect the thermodynamical behavior of a system of interacting fermions, and how this is reflected on the Casimir force. Even in the simplest setup of two parallel plates, two interesting things happen: first, the order of the transition through which discrete chiral symmetry may be broken/restored changes from second-order for infinitely large separation to first-order for a finite separation between the boundaries. Second, a peculiar behavior in the fermion condensate occurs, resulting in the appearance of two different phases (massless and massive) in the Casimir force. In the third example, we will also be concerned with the Casimir effect on an interacting fermion background over a string of finite length. Using a self-consistent method, we will show how a nontrivial behavior in the Casimir force arises, displaying a switch from an attractive to a repulsive regime, as a result of the competing effects due to the usual attractive Casimir force and a repulsive component coming from the condensate.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-20T07:00:00Z
      DOI: 10.1142/S0217751X22410081
       
  • Casimir effect between spherical objects: Proximity-force approximation
           and beyond using plane waves

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      Authors: Tanja Schoger, Benjamin Spreng, Gert-Ludwig Ingold, Paulo A. Maia Neto
      Abstract: International Journal of Modern Physics A, Ahead of Print.
      For the Casimir interaction between two nearby objects, the plane-wave basis proves convenient for numerical calculations as well as for analytical considerations leading to an optical interpretation of the relevant scattering processes of electromagnetic waves. We review work on the proximity-force approximation (PFA) and corrections to it within the plane-wave basis for systems involving spherical objects. Previous work is extended by allowing for polarization mixing during the reflection at a sphere. In particular, explicit results are presented for perfect electromagnetic conductors. Furthermore, for perfect electric conductors at zero temperature, it is demonstrated that beyond the leading-order correction to the PFA, terms of half-integer order in the distance between the sphere surfaces appear.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-20T07:00:00Z
      DOI: 10.1142/S0217751X22410093
       
  • Dynamical dark energy and infinite statistics

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      Authors: Vishnu Jejjala, Michael J. Kavic, Djordje Minic, Tatsu Takeuchi
      Abstract: International Journal of Modern Physics A, Ahead of Print.
      In the [math]CDM model, dark energy is viewed as a constant vacuum energy density, the cosmological constant in the Einstein–Hilbert action. This assumption can be relaxed in various models that introduce a dynamical dark energy. In this paper, we argue that the mixing between infrared (IR) and ultraviolet (UV) degrees of freedom in quantum gravity leads to infinite statistics, the unique statistics consistent with Lorentz invariance in the presence of nonlocality, and yields a fine structure for dark energy. Introducing IR and UV cutoffs into the quantum gravity action, we deduce the form of [math] as a function of redshift and translate this to the behavior of the Hubble parameter.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-05-20T07:00:00Z
      DOI: 10.1142/S0217751X22420015
       
  • Quantum corrections to soliton energies

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      Authors: N. Graham, H. Weigel
      Abstract: International Journal of Modern Physics A, Ahead of Print.
      We review recent progress in the computation of leading quantum corrections to the energies of classical solitons with topological structure, including multi-soliton models in one space dimension and string configurations in three space dimensions. Taking advantage of analytic continuation techniques to efficiently organize the calculations, we show how quantum corrections affect the stability of solitons in the Shifman–Voloshin model, stabilize charged electroweak strings coupled to a heavy fermion doublet, and bind Nielsen–Olesen vortices at the classical transition between type I and type II superconductors.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-04-27T07:00:00Z
      DOI: 10.1142/S0217751X22410044
       
  • Study of double [math] production mechanisms at COMPASS

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      Authors: Gridin Andrei
      Abstract: International Journal of Modern Physics A, Ahead of Print.
      During the past 40 years, the production of pairs of [math] mesons in high-energy hadron collisions has been studied by several experiments. Despite the experimental and theoretical efforts, the origin of the process and the relative weight of different production mechanisms remain unknown. Depending on the energy scale, the double [math] production can be described by single- and/or double-parton scattering sub-processes and gluon–gluon fusion or quark–antiquark annihilation mechanisms. The process can also be related to the hypothesis of the intrinsic charm of hadrons and the existence of exotic tetraquark states which were predicted by various theoretical models and have recently been observed by the LHCb experiment. To study dimuon pair production, the COMPASS experiment at CERN uses a 190 GeV/[math] negative pion beam impinging on different nuclear targets. First preliminary COMPASS results on [math] pair production will be presented. The search for possible signals from exotic resonances and the study of double [math] production mechanisms will be discussed.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-03-16T07:00:00Z
      DOI: 10.1142/S0217751X22400024
       
  • Phase transitions in anisotropic graphene

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      Authors: M. E. Carrington, A. R. Frey, B. A. Meggison
      Abstract: International Journal of Modern Physics A, Ahead of Print.
      In this paper, we study the effects of anisotropy on phase transitions in graphene. We work with a low-energy effective field theory which is strongly coupled, and solves a coupled set of Schwinger–Dyson equations. We show that the effect of anisotropy is to reduce the critical coupling.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-03-16T07:00:00Z
      DOI: 10.1142/S0217751X22400188
       
  • Monopole Bremsstrahlung

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      Authors: Giorgio Calucci
      Abstract: International Journal of Modern Physics A, Ahead of Print.
      A possible indirect way of detecting the presence of a monopole would be the detection of a photon shower originating from a collision of a monopole with an ordinary particle in the atmosphere with the accompanying Bremsstrahlung. Since a similar photon production can be interpreted as Bremsstrahlung by a heavy nucleus the observation of the simultaneous production of electron–positron pairs may help in distinguishing the two cases.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-03-16T07:00:00Z
      DOI: 10.1142/S0217751X22500415
       
  • Searches for supersymmetry in CMS

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      Authors: Uttiya Sarkar
      Abstract: International Journal of Modern Physics A, Ahead of Print.
      The results from the CMS search for supersymmetric particles based on Run-2 data recorded at a center-of-mass energy of 13 TeV are summarized. Strong and weak production of SUSY scenarios are considered. Results presented include the searches for squarks and gluinos, direct production of charginos, neutralinos and sleptons. These searches involve final state objects comprising jets, missing transverse momentum, electrons or muons, taus or photons, as well as long-lived particles. The data in these searches are found to be consistent with Standard Model predictions and no significant excess is observed. Upper limits have been set on the masses of supersymmetric particles from a variety of search channels.
      Citation: International Journal of Modern Physics A
      PubDate: 2022-03-10T08:00:00Z
      DOI: 10.1142/S0217751X22400048
       
 
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