Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Mikhail D. Croitoru"'
Spectral characteristics of the coherent dynamics of the order parameter in superconducting nanorods
Publikováno v:
Physica C: Superconductivity and its Applications. 533:133-136
Within the density-matrix formalism based on the Bogoliubov-de Gennes equations approach we investigate the dynamics of the non-equilibrium BCS pairing induced by a sudden change of the coupling constant in quasi-1D and quasi-0D samples. We demonstra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc6055c76190c32ec0082ecc644bf1eb
https://doi.org/10.1016/j.physc.2016.06.005
https://doi.org/10.1016/j.physc.2016.06.005
Autor:
François M. Peeters, Milorad V. Milošević, Vollrath M. Axt, Andrey S. Vasenko, A. A. Shanenko, Mikhail D. Croitoru, Alexei Vagov
Publikováno v:
Journal of superconductivity and novel magnetism
We investigate how the interplay of quantum confinement and level broadening caused by disorder affects superconducting correlations in ultra-small metallic grains. We use the electron-phonon interaction-induced electron mass renormalization and the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e83790fe79ec063687595f6293357c66
https://doi.org/10.1007/s10948-015-3319-8
https://doi.org/10.1007/s10948-015-3319-8
Publikováno v:
Physical Review A. 98
We present a numerical study of the interaction quench dynamics in a superfluid ultracold Fermi gas confined in a three-dimensional cigar-shaped harmonic trap. In the present paper we investigate the amplitude mode of the superfluid order parameter a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d4bc84d54ef1a19ffbd7bcca03248219
https://doi.org/10.1103/physreva.98.053605
https://doi.org/10.1103/physreva.98.053605
Publikováno v:
Physical Review A. 97
We present a numerical study of the Higgs mode in an ultracold confined Fermi gas after an interaction quench and find a dynamical vanishing of the superfluid order parameter. Our calculations are done within a microscopic density-matrix approach in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a06ddcc6acefd66abeb947ee2bb9d4c
https://doi.org/10.1103/physreva.97.013619
https://doi.org/10.1103/physreva.97.013619
Publikováno v:
Physical Review A. 96
We present a numerical study of the dynamic response of a confined superfluid Fermi gas to a rapid change of the scattering length (i.e., an interaction quench). Based on a fully microscopic time-dependent density-matrix approach within the full Bogo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::047d966c484e6ebf75135e03e35cd00f
https://doi.org/10.1103/physreva.96.033618
https://doi.org/10.1103/physreva.96.033618
Publikováno v:
Physical review letters. 119(17)
It is commonly assumed that surface plasmon-polariton (SPP) excitations on a metal-dielectric interface decay exponentially inside the metallic sample. Here, we show that in a wide spectral interval the SPP field decays much slower, being inversely p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4dbd65e88e4a6ed2c50d430512c36503
https://pubmed.ncbi.nlm.nih.gov/29219429
https://pubmed.ncbi.nlm.nih.gov/29219429
Autor:
Martin Zachmann, Vollrath M. Axt, A. A. Shanenko, P. Kettmann, Mikhail D. Croitoru, Thomas Papenkort, Alexei Vagov, Tilmann Kuhn
Publikováno v:
Physica: C: superconductivity
We study the coherent dynamics of pairing in a nanoscale superconductor, that is intrinsically multiband, after an external perturbation in the non-adiabatic regime. The description of the dynamics of the pairing order is within the density-matrix ap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b31ba8a2cbe0695b31a487513fadeb35
https://doi.org/10.1016/j.physc.2014.04.014
https://doi.org/10.1016/j.physc.2014.04.014
Publikováno v:
Physical review B
We investigate the dynamics of a quantum emitter (quantum dot) placed in the vicinity of a flat metal surface. The dynamics is induced by the coupling between the emitter and surface plasmon-polaritons. The plasmon-polariton modes are described withi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ecaa429d3bd3f02c62760f37a9bc1ac
https://doi.org/10.1103/physrevb.93.195414
https://doi.org/10.1103/physrevb.93.195414
Publikováno v:
physica status solidi (b). 248:839-842
We have simulated coherent control signals from quantum dots for carrier phonon interactions covering the low as well as the strong coupling limit. Calculations using the correlation expansion for phonon assisted density matrices are compared with nu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a55cd0f5515833f4134f8241d7211e12
https://doi.org/10.1002/pssb.201000842
https://doi.org/10.1002/pssb.201000842
Publikováno v:
Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques
The properties of a clean superconductor with nanoscale dimensions are governed by quantum confinement of the electrons. This results in a spatially inhomogeneous superconducting condensate and in the formation of new Andreev-type quasiparticle state
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d3131388371aecff95b901adf0b9ad1
https://doi.org/10.1134/s1027451008040216
https://doi.org/10.1134/s1027451008040216