Results 11 to 20 of about 11,702 (140)

Effective descriptions of complex quantum systems: path integrals and operator ordering problems [PDF]

, 2005
We study certain aspects of the effective, occasionally called collective, description of complex quantum systems within the framework of the path integral formalism, in which the environment is integrated out.
Adamowski, Ambegaokar, Ambegaokar, Ambegaokar, Ambegaokar, Ambegaokar, Berezin, Caldeira, Caldeira, Caldeira, Eckern, Eckern, Eckern, Feshbach, Feynman, Feynman, Josephson, Keldysh, Kleinert, Kleinert, Koç, Kubo, Lang, Langenberg, Larkin, Leaf, Leggett, Leschke, Mizrahi, Mühlschlegel, Rammer, Sakita, Scalapino, Schmid, Schulman, Schön, Shimshoni, Shimshoni, Tinkham, Waldmann, Werthamer, Zwanzig   +41 more
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Vortex distribution in a confining potential [PDF]

, 2013
We study a model of interacting vortices in a type II superconductor. In the weak coupling limit, we constructed a mean-field theory which allows us to accurately calculate the vortex density distribution inside a confining potential.
Girotto, Matheus, Levin, Yan, Santos, Alexandre Pereira dos   +2 more
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Tunnelling of topological line defects in strongly coupled superfluids [PDF]

, 1999
The geometric theory of vortex tunnelling in superfluid liquids is developed. Geometry rules the tunnelling process in the approximation of an incompressible superfluid, which yields the identity of phase and configuration space in the vortex collective ...
Fischer, Uwe R.
core   +4 more sources

Thermodynamics and gauge/gravity duality for Lifshitz black holes in the presence of exponential electrodynamics [PDF]

, 2016
In this paper, we construct a new class of topological black hole Lifshitz solutions in the presence of nonlinear exponential electrodynamics for Einstein-dilaton gravity.
Dehghani, M. H., Dehyadegari, A., Sheykhi, A., Zangeneh, M. Kord   +3 more
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A microscopic model for Josephson currents

, 2003
A microscopic model of a Josephson junction between two superconducting plates is proposed and analysed. For this model, the nonequilibrium steady state of the total system is explicitly constructed and its properties are analysed.
A Verbeure, Anderson P W, Aschbacher W H, Fannes M, Goderis D, J Lauwers, Jak?i? V, Lauwers J, Likharev K K, Ruelle D, Sewell G L, Thirring W, Thirring W   +12 more
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Casimir Force between two Half Spaces of Vortex Matter in Anisotropic Superconductors

, 2000
We present a new approach to calculate the attractive long-range vortex-vortex interaction of the van der Waals type present in anisotropic and layered superconductors.
Blatter, Blatter, G Blatter, H.G Katzgraber, H.P Büchler, Katzgraber, Lifshitz, Lifshitz, Nelson, Popov   +9 more
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Slippery Wave Functions V2.01 [PDF]

, 2013
Superfluids and superconductors are ordinary matter that show a very surprising behavior at low temperatures. As their temperature is reduced, materials of both kinds can abruptly fall into a state in which they will support a persistent, essentially ...
Kadanoff, Leo P.
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BCS Model in Tsallis' Statistical Framework

, 2001
We show that there is an effect of nonextensivity acting upon the BCS model for superconductors in the ground state that motivates its study in the Tsallis' statistical framework. We show that the weak-coupling limit superconductors are well described by
Anderson, Anteneodo, Bardeen, Biondi, Bogoljubov, Boorse, Büyükkılıç, Curado, E.V.L. de Mello, Giaever, Goodman, Kaniadakis, Lavagno, Lizardo H.C.M. Nunes, Meservey, Morse, Phillips, Plastino, Plastino, Plastino, Prato, Rajagopal, Schrieffer, Tinkham, Tsallis, Zavaritskii   +25 more
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Thermodynamic Framework for Compact q-Gaussian Distributions

, 2017
Recent works have associated systems of particles, characterized by short-range repulsive interactions and evolving under overdamped motion, to a nonlinear Fokker-Planck equation within the class of nonextensive statistical mechanics, with a nonlinear ...
Andrade, Roberto F. S., Curado, Evaldo M. F., Nobre, Fernando D., Souza, Andre M. C.   +3 more
core   +1 more source

Goldstone Bosons in Josephson Junctions

, 2006
For a microscopic model of a Josephson junction the normal coordinates of the two junction Goldstone bosons are constructed and their dynamical spectrum is computed.
André F Verbeure, Brecht S Dierckx, Broidioi M, Broidioi M, Broidioi M, Goderis D, Lauwers J, Likharev K K   +7 more
core   +1 more source