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pro vyhledávání: '"HARTREE APPROXIMATION"'
The third quantization (3rd Q) for bosons provides the exact steady-state solution of the Lindblad equation with quadratic Hamiltonians. By decomposing the interaction of the Bose Hubbard model (BHM) according to Hartree approximation, we present a s
Externí odkaz:
http://arxiv.org/abs/2408.13174
Akademický článek
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We prove existence and uniqueness results for the time-dependent Hartree approximation arising in quantum dynamics. The Hartree equations of motion form a coupled system of nonlinear Schr{\"o}dinger equations for the evolution of product state approx
Externí odkaz:
http://arxiv.org/abs/2207.13928
Akademický článek
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Publikováno v:
JCAP 10 (2013) 018
We use the Hartree approximation to the Einstein equation on de Sitter background to solve for the one loop correction to the graviton mode function. This should give a reasonable approximation to how the ensemble of inflationary gravitons affects a
Externí odkaz:
http://arxiv.org/abs/1307.1422
Publikováno v:
Phys. Rev. D 89, 084013 (2014)
We consider the semiclassical Einstein equations (SEE) in the presence of a quantum scalar field with self-interaction $\lambda\phi^4$. Working in the Hartree truncation of the two-particle irreducible (2PI) effective action, we compute the vacuum ex
Externí odkaz:
http://arxiv.org/abs/1401.6094
Publikováno v:
Phys. Rev. D 89, 024006 (2014)
We consider a quantum scalar field with {\lambda}{\phi}^4 interaction in curved spacetimes. The quantum effects are taken into account nonperturbatively using the Hartree approximation to the 2PI effective action. Although this approximation has been
Externí odkaz:
http://arxiv.org/abs/1309.0864
Autor:
Leganger, Lars E.
At very high densities, QCD is in the color-flavor-locked phase, which is a color-superconducting phase. The diquark condensates break chiral symmetry in the same way as it is broken in vacuum QCD and gives rise to an octet of pseudo-Goldstone bosons
Externí odkaz:
http://arxiv.org/abs/1011.6502
Autor:
Andersen, Jens O., Leganger, Lars E.
Publikováno v:
Nucl.Phys.A828:360-389,2009
At very high densities, QCD is in the color-flavor locked phase, which is a color-superconducting phase. The diquark condensates break chiral symmetry in the same way as it is broken in vacuum QCD and gives rise to an octet of pseudo-Goldstone bosons
Externí odkaz:
http://arxiv.org/abs/0810.5510
Autor:
Baacke, J., Michalski, Stefan
We study the O(N) linear sigma model with spontaneous symmetry breaking at finite temperature in the framework of the two-particle point-irreducible (2PPI) effective action. We go beyond the Hartree approximation by including the two-loop contributio
Externí odkaz:
http://arxiv.org/abs/hep-ph/0312031