On the microscopic theory of superfluid liquids

Autor:	M Yu Kovalevskiĭ, S V Peletminskiĭ, N.N. Bogolyubov, A. M. Kurbatov, A.N. Tarasov
Rok vydání:	1989
Předmět:	Condensed Matter::Quantum Gases Physics Quantum vortex General Physics and Astronomy General Medicine Superfluid film Roton Classical mechanics Superfluid vacuum theory Quantum mechanics Pairing Dissipative system Microscopic theory Superfluid helium-4
Zdroj:	Uspekhi Fizicheskih Nauk. 159:585
ISSN:	1996-6652 0042-1294
DOI:	10.3367/ufnr.0159.198912a.0585
Popis:	This review presents a microscopic construction of the thermodynamics and hydrodynamics of superfluid bosons and fermions with singlet pairing, based on the concept of quasiaverages and the hypothesis of reduced description. Here we do not assume that the Hamiltonian possesses any dynamical symmetry. This has permitted obtaining results pertaining to both Galilean-invariant and relativistic systems. Account is taken of dissipative processes. The kinetic coefficients are presented in terms of the correlation functions of the flux operators. The approach is extended to solutions of quantum liquids. The influence of an external ac field on superfluid systems is studied, and the low-frequency asymptotic behavior of the Green's function is found in the hydrodynamic approximation. The symmetry properties of the equilibrium state are formulated, and the thermodynamics is constructed for superfluid Fermi systems with triplet pairing (the superfluid phases 3He-B and 3He-A). For the latter the flux densities of the additive integrals of motion are found in a state of equilibrium and the equations of "ideal" hydrodynamics are derived.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fcb5597c2d9baccefede0d3498cb84e6 https://doi.org/10.3367/ufnr.0159.198912a.0585 Zobrazit plný text záznamu