Functional-integral approach to Gaussian fluctuations in Eliashberg theory
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DOI: 10.1103/physrevb.104.014513
Abstract: The Eliashberg theory of superconductivity is based on a dynamical electron-phonon interaction as opposed to a static interaction present in BCS theory. The standard derivation of Eliashberg theory is based on an equation of motion… read more here.
Keywords: approach; integral approach; eliashberg theory; functional integral ... See more keywords
General memory kernels and further corrections to the variational path integral approach for the Bogoliubov-Fröhlich Hamiltonian
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DOI: 10.1103/physrevb.105.104304
Abstract: The celebrated variational path integral approach to the polaron problem shows remarkable discrepancies with diagrammatic Monte Carlo for the Bogoliubov-Fr¨ohlich Hamiltonian which describes an impurity weakly coupled to a Bose condensed atomic gas. It has… read more here.
Keywords: path integral; variational path; bogoliubov; approach ... See more keywords
An Overlap-Integral Approach to Quantum Optical Simulation
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DOI: 10.1109/access.2023.3255514
Abstract: A technique for the simulation of multimode quantum optical interferometry and protocols in quantum communications is introduced. This technique is very efficient at simulating in the single-photon-counting regime. This works by treating the photons in… read more here.
Keywords: quantum optical; approach quantum; overlap integral; simulation ... See more keywords
Flow and transport modeling in heterogeneous sediments using an integral approach.
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DOI: 10.1111/gwat.13275
Abstract: An integral approach which can simultaneously model turbulent flow and transport at the sediment-water interface has been recently developed and validated for homogeneous sediment which was achieved by comparing numerical results to flume experiments on… read more here.
Keywords: transport modeling; transport; flow transport; integral approach ... See more keywords