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    - EARTH SCIENCES (473 journals)
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EARTH SCIENCES (473 journals)                  1 2 3 | Last

Showing 1 - 200 of 371 Journals sorted alphabetically
Acta Geochimica     Hybrid Journal   (Followers: 6)
Acta Geodaetica et Geophysica     Hybrid Journal   (Followers: 2)
Acta Geodaetica et Geophysica Hungarica     Full-text available via subscription   (Followers: 2)
Acta Geophysica     Open Access   (Followers: 10)
Acta Geotechnica     Hybrid Journal   (Followers: 7)
Acta Meteorologica Sinica     Hybrid Journal   (Followers: 3)
Advances in High Energy Physics     Open Access   (Followers: 19)
Advances In Physics     Hybrid Journal   (Followers: 20)
Aeolian Research     Hybrid Journal   (Followers: 6)
African Journal of Aquatic Science     Hybrid Journal   (Followers: 13)
Algological Studies     Full-text available via subscription   (Followers: 1)
Alpine Botany     Hybrid Journal   (Followers: 5)
AMBIO     Hybrid Journal   (Followers: 11)
Anales del Instituto de la Patagonia     Open Access  
Andean geology     Open Access   (Followers: 9)
Annales Henri Poincaré     Hybrid Journal   (Followers: 3)
Annales UMCS, Geographia, Geologia, Mineralogia et Petrographia     Open Access  
Annals of Geophysics     Open Access   (Followers: 13)
Annals of GIS     Hybrid Journal   (Followers: 20)
Annual Review of Marine Science     Full-text available via subscription   (Followers: 10)
Anthropocene     Hybrid Journal   (Followers: 4)
Anthropocene Review     Hybrid Journal   (Followers: 6)
Applied Clay Science     Hybrid Journal   (Followers: 6)
Applied Geochemistry     Hybrid Journal   (Followers: 14)
Applied Geomatics     Hybrid Journal   (Followers: 3)
Applied Geophysics     Hybrid Journal   (Followers: 8)
Applied Ocean Research     Hybrid Journal   (Followers: 8)
Applied Petrochemical Research     Open Access   (Followers: 3)
Aquatic Conservation Marine and Freshwater Ecosystems     Hybrid Journal   (Followers: 35)
Arctic Science     Open Access   (Followers: 7)
Arctic, Antarctic, and Alpine Research     Full-text available via subscription   (Followers: 9)
Artificial Satellites : The Journal of Space Research Centre of Polish Academy of Sciences     Open Access   (Followers: 20)
Asia-Pacific Journal of Atmospheric Sciences     Hybrid Journal   (Followers: 19)
Asian Journal of Earth Sciences     Open Access   (Followers: 19)
Asian Review of Environmental and Earth Sciences     Open Access   (Followers: 2)
Atlantic Geology : Journal of the Atlantic Geoscience Society / Atlantic Geology : revue de la Société Géoscientifique de l'Atlantique     Full-text available via subscription   (Followers: 9)
Atmosphere-Ocean     Full-text available via subscription   (Followers: 12)
Atmospheric and Climate Sciences     Open Access   (Followers: 24)
Australian Journal of Earth Sciences: An International Geoscience Journal of the Geological Society of Australia     Hybrid Journal   (Followers: 10)
Boletim de Ciências Geodésicas     Open Access  
Bonorowo Wetlands     Open Access  
Boreas: An International Journal of Quaternary Research     Hybrid Journal   (Followers: 11)
Bragantia     Open Access   (Followers: 2)
Bulletin of Earthquake Engineering     Hybrid Journal   (Followers: 11)
Bulletin of Geosciences     Open Access   (Followers: 8)
Bulletin of the Lebedev Physics Institute     Hybrid Journal   (Followers: 1)
Bulletin of the Seismological Society of America     Full-text available via subscription   (Followers: 23)
Bulletin of Volcanology     Hybrid Journal   (Followers: 20)
Cadernos de Geociências     Open Access  
Canadian Mineralogist     Full-text available via subscription   (Followers: 6)
Canadian Water Resources Journal     Hybrid Journal   (Followers: 20)
Carbonates and Evaporites     Hybrid Journal   (Followers: 2)
CATENA     Hybrid Journal   (Followers: 8)
Chemical Geology     Hybrid Journal   (Followers: 25)
Chemie der Erde - Geochemistry     Hybrid Journal   (Followers: 5)
Chinese Geographical Science     Hybrid Journal   (Followers: 5)
Chinese Journal of Oceanology and Limnology     Hybrid Journal   (Followers: 4)
Ciencia del suelo     Open Access   (Followers: 2)
Ciencias Espaciales     Open Access  
Climate and Development     Hybrid Journal   (Followers: 12)
Coastal Management     Hybrid Journal   (Followers: 25)
Cogent Geoscience     Open Access  
Comptes Rendus Geoscience     Full-text available via subscription   (Followers: 9)
Computational Geosciences     Hybrid Journal   (Followers: 16)
Computational Mathematics and Mathematical Physics     Hybrid Journal   (Followers: 3)
Computers and Geotechnics     Hybrid Journal   (Followers: 11)
Contemporary Trends in Geoscience     Open Access   (Followers: 2)
Continental Shelf Research     Hybrid Journal   (Followers: 9)
Contributions to Mineralogy and Petrology     Hybrid Journal   (Followers: 12)
Contributions to Plasma Physics     Hybrid Journal   (Followers: 4)
Coral Reefs     Hybrid Journal   (Followers: 18)
Cretaceous Research     Hybrid Journal   (Followers: 11)
Cybergeo : European Journal of Geography     Open Access   (Followers: 5)
Depositional Record     Open Access   (Followers: 2)
Developments in Geotectonics     Full-text available via subscription   (Followers: 2)
Developments in Quaternary Science     Full-text available via subscription   (Followers: 4)
Développement durable et territoires     Open Access   (Followers: 2)
Diatom Research     Hybrid Journal   (Followers: 3)
Doklady Physics     Hybrid Journal   (Followers: 1)
Dynamics of Atmospheres and Oceans     Hybrid Journal   (Followers: 13)
E&S Engineering and Science     Open Access  
E3S Web of Conferences     Open Access   (Followers: 1)
Earth and Planetary Science Letters     Hybrid Journal   (Followers: 154)
Earth and Space Science     Open Access   (Followers: 14)
Earth Interactions     Full-text available via subscription   (Followers: 12)
Earth Science Frontiers     Full-text available via subscription   (Followers: 7)
Earth Science Malaysia     Open Access  
Earth Science Research     Open Access   (Followers: 9)
Earth Sciences Pakistan     Open Access  
Earth Surface Dynamics (ESurf)     Open Access   (Followers: 7)
Earth Surface Processes and Landforms     Hybrid Journal   (Followers: 20)
Earth System Dynamics     Open Access   (Followers: 7)
Earth System Dynamics Discussions     Open Access   (Followers: 4)
Earth's Future     Open Access   (Followers: 1)
Earth, Planets and Space     Open Access   (Followers: 67)
Earthquake Engineering and Engineering Vibration     Hybrid Journal   (Followers: 9)
Earthquake Science     Hybrid Journal   (Followers: 11)
Earthquake Spectra     Full-text available via subscription   (Followers: 21)
Ecohydrology     Hybrid Journal   (Followers: 9)
Ecological Questions     Open Access   (Followers: 3)
Electromagnetics     Hybrid Journal   (Followers: 8)
Energy Efficiency     Hybrid Journal   (Followers: 10)
Energy Exploration & Exploitation     Open Access   (Followers: 4)
Environmental Earth Sciences     Hybrid Journal   (Followers: 25)
Environmental Geology     Hybrid Journal   (Followers: 18)
Environmental Geosciences     Full-text available via subscription   (Followers: 5)
Environmental Geotechnics     Hybrid Journal   (Followers: 5)
Erwerbs-Obstbau     Hybrid Journal  
Estuaries and Coasts     Hybrid Journal   (Followers: 18)
Estuarine, Coastal and Shelf Science     Hybrid Journal   (Followers: 35)
Estudios Geográficos     Open Access  
European Journal of Mineralogy     Full-text available via subscription   (Followers: 15)
European Journal of Remote Sensing     Open Access   (Followers: 5)
Exploration Geophysics     Hybrid Journal   (Followers: 3)
Facies     Hybrid Journal   (Followers: 10)
Fieldiana Life and Earth Sciences     Full-text available via subscription   (Followers: 1)
Física de la Tierra     Open Access  
Folia Musei rerum naturalium Bohemiae occidentalis. Geologica et Paleobiologica     Open Access  
Folia Quaternaria     Open Access  
Forestry Chronicle     Full-text available via subscription   (Followers: 9)
Frontiers in Earth Science     Open Access   (Followers: 5)
Frontiers in Geotechnical Engineering     Open Access   (Followers: 3)
Frontiers of Earth Science     Hybrid Journal   (Followers: 8)
Fundamental and Applied Limnology / Archiv für Hydrobiologie     Full-text available via subscription   (Followers: 4)
GEM - International Journal on Geomathematics     Hybrid Journal   (Followers: 1)
Geo-Marine Letters     Hybrid Journal   (Followers: 6)
Geoacta     Open Access   (Followers: 2)
Geobiology     Hybrid Journal   (Followers: 8)
Geocarto International     Hybrid Journal   (Followers: 22)
Geochemistry : Exploration, Environment, Analysis     Hybrid Journal   (Followers: 7)
Geochemistry, Geophysics, Geosystems     Full-text available via subscription   (Followers: 30)
Geochimica et Cosmochimica Acta     Hybrid Journal   (Followers: 53)
Geochronometria     Hybrid Journal   (Followers: 2)
Geoderma Regional : The International Journal for Regional Soil Research     Full-text available via subscription   (Followers: 4)
Geodinamica Acta     Open Access   (Followers: 2)
Geodynamics & Tectonophysics     Open Access   (Followers: 2)
Geoenvironmental Disasters     Open Access   (Followers: 3)
Geofluids     Open Access   (Followers: 4)
Geoforum     Hybrid Journal   (Followers: 25)
Géographie physique et Quaternaire     Full-text available via subscription   (Followers: 1)
Geography and Natural Resources     Hybrid Journal   (Followers: 7)
GeoHealth     Open Access  
Geoheritage     Hybrid Journal   (Followers: 1)
Geoinformatica Polonica : The Journal of Polish Academy of Arts and Sciences     Open Access  
Geoinformatics & Geostatistics     Hybrid Journal   (Followers: 11)
Geological Journal     Hybrid Journal   (Followers: 17)
Geological Magazine     Hybrid Journal   (Followers: 16)
Geology Today     Hybrid Journal   (Followers: 29)
Geology, Geophysics and Environment     Open Access   (Followers: 2)
Geomagnetism and Aeronomy     Hybrid Journal   (Followers: 3)
Geomatics, Natural Hazards and Risk     Open Access   (Followers: 11)
Geomechanics for Energy and the Environment     Full-text available via subscription   (Followers: 1)
GEOmedia     Open Access   (Followers: 1)
Geomorphology     Hybrid Journal   (Followers: 30)
Geophysical & Astrophysical Fluid Dynamics     Hybrid Journal   (Followers: 2)
Geophysical Journal International     Hybrid Journal   (Followers: 35)
Geophysical Prospecting     Hybrid Journal   (Followers: 8)
Geophysics     Full-text available via subscription   (Followers: 21)
GeoResJ     Hybrid Journal  
Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards     Hybrid Journal   (Followers: 10)
Geoscience Canada : Journal of the Geological Association of Canada / Geoscience Canada : journal de l'Association Géologique du Canada     Full-text available via subscription   (Followers: 6)
Geoscience Data Journal     Open Access   (Followers: 2)
Geoscience Frontiers     Open Access   (Followers: 9)
Geoscience Letters     Open Access  
Geoscience Records     Open Access  
Geosciences     Open Access   (Followers: 1)
Geosciences Journal     Hybrid Journal   (Followers: 9)
Geoscientific Instrumentation, Methods and Data Systems     Open Access   (Followers: 4)
Geoscientific Model Development     Open Access   (Followers: 2)
Geostandards and Geoanalytical Research     Hybrid Journal   (Followers: 2)
Geosystem Engineering     Hybrid Journal   (Followers: 1)
Geotectonic Research     Full-text available via subscription   (Followers: 4)
Geotectonics     Hybrid Journal   (Followers: 7)
GISAP : Earth and Space Sciences     Open Access   (Followers: 1)
Glass Physics and Chemistry     Hybrid Journal   (Followers: 4)
Global and Planetary Change     Hybrid Journal   (Followers: 16)
Global Biogeochemical Cycles     Full-text available via subscription   (Followers: 18)
Gondwana Research     Hybrid Journal   (Followers: 11)
GPS Solutions     Hybrid Journal   (Followers: 24)
Grassland Science     Hybrid Journal  
Ground Water     Hybrid Journal   (Followers: 36)
Ground Water Monitoring & Remediation     Hybrid Journal   (Followers: 18)
Groundwater for Sustainable Development     Full-text available via subscription   (Followers: 3)
Helgoland Marine Research     Open Access   (Followers: 3)
History of Geo- and Space Sciences     Open Access   (Followers: 1)
Hydrobiologia     Hybrid Journal   (Followers: 18)
Hydrogeology Journal     Hybrid Journal   (Followers: 20)
Hydrological Processes     Hybrid Journal   (Followers: 30)
Hydrology and Earth System Sciences     Open Access   (Followers: 29)
ICES Journal of Marine Science: Journal du Conseil     Hybrid Journal   (Followers: 50)
IEEE Journal of Oceanic Engineering     Hybrid Journal   (Followers: 11)
Indian Geotechnical Journal     Hybrid Journal   (Followers: 4)
Indonesian Journal on Geoscience     Open Access   (Followers: 2)
Interdisciplinary Environmental Review     Hybrid Journal   (Followers: 3)
International Geology Review     Hybrid Journal   (Followers: 14)
International Journal of Advanced Geosciences     Open Access   (Followers: 2)
International Journal of Advanced Remote Sensing and GIS     Open Access   (Followers: 39)
International Journal of Advancement in Earth and Enviromental Sciences     Open Access   (Followers: 4)
International Journal of Advancement in Remote Sensing, GIS, and Geography     Open Access   (Followers: 31)
International Journal of Applied Earth Observation and Geoinformation     Hybrid Journal   (Followers: 34)

        1 2 3 | Last

Journal Cover
Annales Henri Poincaré
Journal Prestige (SJR): 1.097
Citation Impact (citeScore): 2
Number of Followers: 3  
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1424-0637 - ISSN (Online) 1424-0661
Published by Springer-Verlag Homepage  [2350 journals]
  • Large Strebel Graphs and (3,2) Liouville CFT
    • Authors: Séverin Charbonnier; Bertrand Eynard; François David
      Pages: 1611 - 1645
      Abstract: 2D quantum gravity is the idea that a set of discretized surfaces (called map, a graph on a surface), equipped with a graph measure, converges in the large size limit (large number of faces) to a conformal field theory (CFT), and in the simplest case to the simplest CFT known as pure gravity, also known as the gravity dressed (3,2) minimal model. Here, we consider the set of planar Strebel graphs (planar trivalent metric graphs) with fixed perimeter faces, with the measure product of Lebesgue measure of all edge lengths, submitted to the perimeter constraints. We prove that expectation values of a large class of observables indeed converge toward the CFT amplitudes of the (3,2) minimal model.
      PubDate: 2018-06-01
      DOI: 10.1007/s00023-018-0662-x
      Issue No: Vol. 19, No. 6 (2018)
  • Derivation of an Ornstein–Uhlenbeck Process for a Massive Particle in a
           Rarified Gas of Particles
    • Authors: Thierry Bodineau; Isabelle Gallagher; Laure Saint-Raymond
      Pages: 1647 - 1709
      Abstract: We consider the statistical motion of a convex rigid body in a gas of N smaller (spherical) atoms close to thermodynamic equilibrium. Because the rigid body is much bigger and heavier, it undergoes a lot of collisions leading to small deflections. We prove that its velocity is described, in a suitable limit, by an Ornstein–Uhlenbeck process. The strategy of proof relies on Lanford’s arguments (Lecture notes in physics, vol 38, Springer, New York, pp 1–111, 1975) together with the pruning procedure from Bodineau et al. (Invent Math 203(2):493–553, 2016) to reach diffusive times, much larger than the mean free time. Furthermore, we need to introduce a modified dynamics to avoid pathological collisions of atoms with the rigid body: these collisions, due to the geometry of the rigid body, require developing a new type of trajectory analysis.
      PubDate: 2018-06-01
      DOI: 10.1007/s00023-018-0674-6
      Issue No: Vol. 19, No. 6 (2018)
  • Balance Between Quantum Markov Semigroups
    • Authors: Rocco Duvenhage; Machiel Snyman
      Pages: 1747 - 1786
      Abstract: The concept of balance between two state-preserving quantum Markov semigroups on von Neumann algebras is introduced and studied as an extension of conditions appearing in the theory of quantum detailed balance. This is partly motivated by the theory of joinings. Balance is defined in terms of certain correlated states (couplings), with entangled states as a specific case. Basic properties of balance are derived, and the connection to correspondences in the sense of Connes is discussed. Some applications and possible applications, including to non-equilibrium statistical mechanics, are briefly explored.
      PubDate: 2018-06-01
      DOI: 10.1007/s00023-018-0664-8
      Issue No: Vol. 19, No. 6 (2018)
  • Symmetries Versus Conservation Laws in Dynamical Quantum Systems: A
           Unifying Approach Through Propagation of Fixed Points
    • Authors: Aurelian Gheondea
      Pages: 1787 - 1816
      Abstract: We unify recent Noether-type theorems on the equivalence of symmetries with conservation laws for dynamical systems of Markov processes, of quantum operations, and of quantum stochastic maps, by means of some abstract results on propagation of fixed points for completely positive maps on \(C^*\) -algebras. We extend most of the existing results with characterisations in terms of dual infinitesimal generators of the corresponding strongly continuous one-parameter semigroups. By means of an ergodic theorem for dynamical systems of completely positive maps on von Neumann algebras, we show the consistency of the condition on the standard deviation for dynamical systems of quantum operations, and hence of quantum stochastic maps as well, in case the underlying Hilbert space is infinite dimensional.
      PubDate: 2018-06-01
      DOI: 10.1007/s00023-018-0666-6
      Issue No: Vol. 19, No. 6 (2018)
  • Toward Entanglement Entropy with UV-Cutoff in Conformal Nets
    • Authors: Yul Otani; Yoh Tanimoto
      Pages: 1817 - 1842
      Abstract: We consider the entanglement entropy for a spacetime region and its spacelike complement in the framework of algebraic quantum field theory. For a Möbius covariant local net (a chiral component of a two-dimensional conformal field theory) satisfying either a certain nuclearity property or the split property, we consider the von Neumann entropy for type I factors between local algebras and introduce an entropic quantity. Then we implement a cutoff on this quantity with respect to the conformal Hamiltonian and show that it remains finite as the distance of two intervals tends to zero. We compare our definition to others in the literature.
      PubDate: 2018-06-01
      DOI: 10.1007/s00023-018-0671-9
      Issue No: Vol. 19, No. 6 (2018)
  • Rényi Divergences as Weighted Non-commutative Vector-Valued $$L_p$$ L p
    • Authors: Mario Berta; Volkher B. Scholz; Marco Tomamichel
      Pages: 1843 - 1867
      Abstract: We show that Araki and Masuda’s weighted non-commutative vector-valued \(L_p\) -spaces (Araki and Masuda in Publ Res Inst Math Sci Kyoto Univ 18:339–411, 1982) correspond to an algebraic generalization of the sandwiched Rényi divergences with parameter \(\alpha = \frac{p}{2}\) . Using complex interpolation theory, we prove various fundamental properties of these divergences in the setup of von Neumann algebras, including a data-processing inequality and monotonicity in \(\alpha \) . We thereby also give new proofs for the corresponding finite-dimensional properties. We discuss the limiting cases \(\alpha \rightarrow \{\frac{1}{2},1,\infty \}\) leading to minus the logarithm of Uhlmann’s fidelity, Umegaki’s relative entropy, and the max-relative entropy, respectively. As a contribution that might be of independent interest, we derive a Riesz–Thorin theorem for Araki–Masuda \(L_p\) -spaces and an Araki–Lieb–Thirring inequality for states on von Neumann algebras.
      PubDate: 2018-06-01
      DOI: 10.1007/s00023-018-0670-x
      Issue No: Vol. 19, No. 6 (2018)
  • Quantum Compression Relative to a Set of Measurements
    • Authors: Andreas Bluhm; Lukas Rauber; Michael M. Wolf
      Pages: 1891 - 1937
      Abstract: In this work, we investigate the possibility of compressing a quantum system to one of smaller dimension in a way that preserves the measurement statistics of a given set of observables. In this process, we allow for an arbitrary amount of classical side information. We find that the latter can be bounded, which implies that the minimal compression dimension is stable in the sense that it cannot be decreased by allowing for small errors. Various bounds on the minimal compression dimension are proven, and an SDP-based algorithm for its computation is provided. The results are based on two independent approaches: an operator algebraic method using a fixed-point result by Arveson and an algebro-geometric method that relies on irreducible polynomials and Bézout’s theorem. The latter approach allows lifting the results from the single-copy level to the case of multiple copies and from completely positive to merely positive maps.
      PubDate: 2018-06-01
      DOI: 10.1007/s00023-018-0660-z
      Issue No: Vol. 19, No. 6 (2018)
  • Self-Adjointness of Dirac Operators with Infinite Mass Boundary Conditions
           in Sectors
    • Authors: Loïc Le Treust; Thomas Ourmières-Bonafos
      Pages: 1465 - 1487
      Abstract: This paper deals with the study of the two-dimensional Dirac operator with infinite mass boundary conditions in sectors. We investigate the question of self-adjointness depending on the aperture of the sector: when the sector is convex it is self-adjoint on a usual Sobolev space, whereas when the sector is non-convex it has a family of self-adjoint extensions parametrized by a complex number of the unit circle. As a by-product of the analysis, we are able to give self-adjointness results on polygonal domains. We also discuss the question of distinguished self-adjoint extensions and study basic spectral properties of the Dirac operator with a mass term in the sector.
      PubDate: 2018-05-01
      DOI: 10.1007/s00023-018-0661-y
      Issue No: Vol. 19, No. 5 (2018)
  • A Scattering Approach to a Surface with Hyperbolic Cusp
    • Authors: Nikolaos Roidos
      Pages: 1489 - 1505
      Abstract: Let X be a two-dimensional smooth manifold with boundary \(S^{1}\) and \(Y=[1,\infty )\times S^{1}\) . We consider a family of complete surfaces arising by endowing \(X\cup _{S^{1}}Y\) with a parameter-dependent Riemannian metric, such that the restriction of the metric to Y converges to the hyperbolic metric as a limit with respect to the parameter. We describe the associated spectral and scattering theory of the Laplacian for such a surface. We further show that on Y the zero \(S^{1}\) -Fourier coefficient of the generalized eigenfunction of this Laplacian, as a family with respect to the parameter, approximates in a certain sense, for large values of the spectral parameter, the zero \(S^{1}\) -Fourier coefficient of the generalized eigenfunction of the Laplacian for the case of a surface with hyperbolic cusp.
      PubDate: 2018-05-01
      DOI: 10.1007/s00023-018-0669-3
      Issue No: Vol. 19, No. 5 (2018)
  • Generalised Spin Structures in General Relativity
    • Authors: Bas Janssens
      Pages: 1587 - 1610
      Abstract: Generalised spin structures describe spinor fields that are coupled to both general relativity and gauge theory. We classify those generalised spin structures for which the corresponding fields admit an infinitesimal action of the space–time diffeomorphism group. This can be seen as a refinement of the classification of generalised spin structures by Avis and Isham (Commun Math Phys 72:103–118, 1980).
      PubDate: 2018-05-01
      DOI: 10.1007/s00023-018-0667-5
      Issue No: Vol. 19, No. 5 (2018)
  • Newtonian Limits of Isolated Cosmological Systems on Long Time Scales
    • Authors: Chao Liu; Todd A. Oliynyk
      Abstract: We establish the existence of 1-parameter families of \(\epsilon \) -dependent solutions to the Einstein–Euler equations with a positive cosmological constant \(\Lambda >0\) and a linear equation of state \(p=\epsilon ^2 K \rho \) , \(0<K\le 1/3\) , for the parameter values \(0<\epsilon < \epsilon _0\) . These solutions exist globally to the future, converge as \(\epsilon \searrow 0\) to solutions of the cosmological Poisson–Euler equations of Newtonian gravity, and are inhomogeneous nonlinear perturbations of FLRW fluid solutions.
      PubDate: 2018-06-04
      DOI: 10.1007/s00023-018-0686-2
  • Ruled Strips with Asymptotically Diverging Twisting
    • Authors: David Krejčiřík; Rafael Tiedra de Aldecoa
      Abstract: We consider the Dirichlet Laplacian in a two-dimensional strip composed of segments translated along a straight line with respect to a rotation angle with velocity diverging at infinity. We show that this model exhibits a “raise of dimension” at infinity leading to an essential spectrum determined by an asymptotic three-dimensional tube of annular cross section. If the cross section of the asymptotic tube is a disc, we also prove the existence of discrete eigenvalues below the essential spectrum.
      PubDate: 2018-06-02
      DOI: 10.1007/s00023-018-0684-4
  • Constructive Renormalization of the 2-Dimensional Grosse–Wulkenhaar
    • Authors: Zhituo Wang
      Abstract: We study a quartic matrix model with partition function \(Z=\int d\ M\exp \mathrm{Tr}\ (-\Delta M^2-\frac{\lambda }{4}M^4)\) . The integral is over the space of Hermitian \((\varLambda +1)\times (\varLambda +1)\) matrices, the matrix \(\Delta \) , which is not a multiple of the identity matrix, encodes the dynamics and \(\lambda >0\) is a scalar coupling constant. We proved that the logarithm of the partition function is the Borel sum of the perturbation series and hence is a well-defined analytic function of the coupling constant in certain analytic domain of \(\lambda \) , by using the multi-scale loop vertex expansions. All the non-planar graphs generated in the perturbation expansions have been taken care of on the same footing as the planar ones. This model is derived from the self-dual \(\phi ^4\) theory on the 2-dimensional Moyal space also called the 2-dimensional Grosse–Wulkenhaar model. This would also be the first fully constructed matrix model which is non-trivial and not solvable.
      PubDate: 2018-06-02
      DOI: 10.1007/s00023-018-0688-0
  • Ground State Properties of the Holstein–Hubbard Model
    • Authors: Tadahiro Miyao
      Abstract: We study the ground state properties of the Holstein–Hubbard model on some bipartite lattices at half-filling; The ground state is proved to exhibit ferrimagnetism whenever the electron–phonon interaction is not so strong. In addition, the antiferromagnetic long-range order is shown to exist in the ground state. In contrast to this, we prove the absence of the long-range charge order.
      PubDate: 2018-05-31
      DOI: 10.1007/s00023-018-0690-6
  • Existence of Locally Maximally Entangled Quantum States via Geometric
           Invariant Theory
    • Authors: Jim Bryan; Zinovy Reichstein; Mark Van Raamsdonk
      Abstract: We study a question which has natural interpretations both in quantum mechanics and in geometry. Let \(V_{1},\cdots , V_{n}\) be complex vector spaces of dimension \(d_{1},\ldots ,d_{n}\) and let \(G= {\text {SL}}_{d_{1}} \times \cdots \times {\text {SL}}_{d_{n}}\) . Geometrically, we ask: Given \((d_{1},\ldots ,d_{n})\) , when is the geometric invariant theory quotient \(\mathbb {P}(V_{1}\otimes \cdots \otimes V_{n})/\!/G\) non-empty' This is equivalent to the quantum mechanical question of whether the multipart quantum system with Hilbert space \(V_{1}\otimes \cdots \otimes V_{n}\) has a locally maximally entangled state, i.e., a state such that the density matrix for each elementary subsystem is a multiple of the identity. We show that the answer to this question is yes if and only if \(R(d_{1},\cdots ,d_{n})\geqslant 0\) where $$\begin{aligned} R(d_{1},\cdots ,d_{n}) = \prod _{i}d_{i} +\sum _{k=1}^{n} (-1)^{k}\sum _{1\leqslant i_{1}<\cdots <i_{k}\leqslant n} \left( \gcd (d_{i_{1}},\cdots ,d_{i_{k}}) \right) ^{2}. \end{aligned}$$ We also provide a simple recursive algorithm which determines the answer to the question, and we compute the dimension of the resulting quotient in the non-empty cases.
      PubDate: 2018-05-31
      DOI: 10.1007/s00023-018-0682-6
  • The Eleven-Dimensional Supergravity Equations on Edge Manifolds
    • Abstract: We study the 11-dimensional supergravity equations which describe a low-energy approximation to string theories and are related to M-theory under the AdS/CFT correspondence. These equations take the form of a nonlinear differential system, on \(\mathbb B^7\times \mathbb S^4\) with the characteristic degeneracy at the boundary of an edge system, associated with the fibration with fiber \(\mathbb S^4.\) We compute the indicial roots of the linearized system from the Hodge decomposition of the 4-sphere following the work of Kantor, and then using the edge calculus and scattering theory, we prove that the moduli space of solutions, near the Freund–Rubin states, is parametrized by three pairs of data on the bounding 6-sphere.
      PubDate: 2018-05-30
      DOI: 10.1007/s00023-018-0689-z
  • Algebraic Quantum Field Theory on Spacetimes with Timelike Boundary
    • Authors: Marco Benini; Claudio Dappiaggi; Alexander Schenkel
      Abstract: We analyze quantum field theories on spacetimes M with timelike boundary from a model-independent perspective. We construct an adjunction which describes a universal extension to the whole spacetime M of theories defined only on the interior \(\mathrm {int}M\) . The unit of this adjunction is a natural isomorphism, which implies that our universal extension satisfies Kay’s F-locality property. Our main result is the following characterization theorem: Every quantum field theory on M that is additive from the interior (i.e., generated by observables localized in the interior) admits a presentation by a quantum field theory on the interior \(\mathrm {int}M\) and an ideal of its universal extension that is trivial on the interior. We shall illustrate our constructions by applying them to the free Klein–Gordon field.
      PubDate: 2018-05-30
      DOI: 10.1007/s00023-018-0687-1
  • Strong Convergence of Quantum Random Walks Via Semigroup Decomposition
    • Authors: Alexander C. R. Belton; Michał Gnacik; J. Martin Lindsay
      Abstract: We give a simple and direct treatment of the strong convergence of quantum random walks to quantum stochastic operator cocycles, via the semigroup decomposition of such cocycles. Our approach also delivers convergence of the pointwise product of quantum random walks to the quantum stochastic Trotter product of the respective limit cocycles, thereby revealing the algebraic structure of the limiting procedure. The repeated quantum interactions model is shown to fit nicely into the convergence scheme described.
      PubDate: 2018-04-21
      DOI: 10.1007/s00023-018-0676-4
  • The Shape of the Emerging Condensate in Effective Models of Condensation
    • Authors: Volker Betz; Steffen Dereich; Peter Mörters
      Abstract: We consider effective models of condensation where the condensation occurs as time t goes to infinity. We provide natural conditions under which the buildup of the condensate occurs on a spatial scale of 1 / t and has the universal form of a Gamma density. The exponential parameter of this density is determined only by the equation and the total mass of the condensate, while the power law parameter may in addition depend on the decay properties of the initial condition near the condensation point. We apply our results to some examples, including simple models of Bose–Einstein condensation.
      PubDate: 2018-04-17
      DOI: 10.1007/s00023-018-0673-7
  • Matrix Product Ensembles of Hermite Type and the Hyperbolic
           Harish-Chandra–Itzykson–Zuber Integral
    • Authors: P. J. Forrester; J. R. Ipsen; Dang-Zheng Liu
      Abstract: We investigate spectral properties of a Hermitised random matrix product which, contrary to previous product ensembles, allows for eigenvalues on the full real line. We prove that the eigenvalues form a bi-orthogonal ensemble, which reduces asymptotically to the Hermite Muttalib–Borodin ensemble. Explicit expressions for the bi-orthogonal functions as well as the correlation kernel are provided. Scaling the latter near the origin gives a limiting kernel involving Meijer G-functions, and the functional form of the global density is calculated. As a part of this study, we introduce a new matrix transformation which maps the space of polynomial ensembles onto itself. This matrix transformation is closely related to the so-called hyperbolic Harish-Chandra–Itzykson–Zuber integral.
      PubDate: 2018-02-24
      DOI: 10.1007/s00023-018-0654-x
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