Zobrazeno 1 - 10
of 249
pro vyhledávání: '"S. N. Klimin"'
Publikováno v:
New Journal of Physics, Vol 25, Iss 6, p 063011 (2023)
We consider collective excitations in the superfluid state of Fermi condensed charged gases. The dispersion and damping of collective excitations at nonzero temperatures are examined, and the coexistence and interaction of different branches of colle
Externí odkaz:
https://doaj.org/article/5bdb7076be91478691e53085c2ec6d8c
Publikováno v:
New Journal of Physics, Vol 21, Iss 11, p 113043 (2019)
The Leggett collective excitations for a two-band Fermi gas with s -wave pairing and Josephson interband coupling in the BCS-BEC crossover at finite temperatures are investigated within the Gaussian pair fluctuation approach. Eigenfrequencies and dam
Externí odkaz:
https://doaj.org/article/37c3ec82e65a4330974df8ff8cf26bc5
Publikováno v:
New Journal of Physics, Vol 20, Iss 5, p 053052 (2018)
In this work dark soliton collisions in a one-dimensional superfluid Fermi gas are studied across the BEC-BCS crossover by means of a recently developed finite-temperature effective field theory (2015 Eur. Phys. J. B 88 122). The evolution of two cou
Externí odkaz:
https://doaj.org/article/aa77d1ccae2d4ec989d280a309cd98ec
Publikováno v:
New Journal of Physics, Vol 20, Iss 2, p 025010 (2018)
We report the equilibrium vortex phase diagram of a rotating two-band Fermi gas confined to a cylindrically symmetric parabolic trapping potential, using the recently developed finite-temperature effective field theory (Klimin et al 2016 Phys. Rev. A
Externí odkaz:
https://doaj.org/article/baa0d4aa5ca14eddaa99087d12810541
Publikováno v:
Physical review A
Studying the collective pairing phenomena in a two-component Fermi gas, we predict the appearance near the transition temperature $T_c$ of a well-resolved collective mode of quadratic dispersion. The mode is visible both above and below $T_c$ in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f7a9235611c848cddc75ccc990cd7c6
https://doi.org/10.1103/physreva.103.043336
https://doi.org/10.1103/physreva.103.043336
Publikováno v:
European physical journal : B : condensed matter and complex systems
The dielectric function method (DFM), which uses a non-adiabatic approach to calculate the critical temperatures for superconductivity, has been quite successful in describing superconductors at low carrier densities. This regime of carrier densities
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c358dfa787c87f6f61f2f3b49add59bd
http://arxiv.org/abs/1909.00609
http://arxiv.org/abs/1909.00609
Publikováno v:
PHYSICAL REVIEW A
In the present article the snake instability mechanism for dark solitons in superfluid Fermi gases is studied in the context of a recently developed effective field theory [S. N. Klimin et al., Eur. Phys. J. B 88, 122 (2015)]. This theoretical treatm
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::02378994db7fdba85628dab74af45d4d
https://hdl.handle.net/10067/1456250151162165141
https://hdl.handle.net/10067/1456250151162165141
Publikováno v:
New Journal of Physics, Vol 14, Iss 10, p 103044 (2012)
The physics of the pseudogap state is intimately linked with the pairing mechanism that gives rise to superfluidity in quantum gases and to superconductivity in high- T _c cuprates, and therefore, both in quantum gases and in superconductors, the pse
Externí odkaz:
https://doaj.org/article/402926bf5c2342f6aca22fd23a2aee0e
Publikováno v:
Physical review B
We present results for the solution of the large polaron Fr\"ohlich Hamiltonian in 3 dimensions (3D) and 2 dimensions (2D) obtained via the diagrammatic Monte Carlo (DMC) method. Our implementation is based on the approach by Mishchenko [A. S. Mishch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fdbba95e214911d3376ed795dfbf56b3
https://doi.org/10.1103/physrevb.97.134305
https://doi.org/10.1103/physrevb.97.134305
Publikováno v:
Physical review A
We study the phononic collective modes of the pairing field $\Delta$ and their corresponding signature in both the order-parameter and density response functions for a superfluid Fermi gas at all temperatures below $T_c$ in the collisionless regime.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24c2dbb310e2bfc013d3749247cce7c0