Finite-Temperature Transport Properties of Normal Fermi Systems. III. Dissipative Effects in a Simple Perturbative Model

1966 ◽  
Vol 143 (1) ◽  
pp. 110-121 ◽  
Author(s):  
M. Watabe ◽  
R. Dagonnier
Keyword(s):  
Transport Properties ◽  
Finite Temperature ◽  
Fermi Systems ◽  
Dissipative Effects ◽  
Normal Fermi

scholarly journals Zero and First Sound in Normal Fermi Systems

2009 ◽  
Vol 158 (5-6) ◽  
pp. 773-805 ◽  
Author(s):  
Shohei Watabe ◽  
Aiko Osawa ◽  
Tetsuro Nikuni
Keyword(s):  
Fermi Systems ◽  
First Sound ◽  
Normal Fermi

scholarly journals Pair fluctuations in ultra-small Fermi systems within self-consistent RPA at finite temperature

2003 ◽  
Vol 307 (2) ◽  
pp. 308-334 ◽  
Author(s):  
A. Storozhenko ◽  
P. Schuck ◽  
J. Dukelsky ◽  
G. Röpke ◽  
A. Vdovin
Keyword(s):  
Finite Temperature ◽  
Fermi Systems ◽  
Self Consistent

scholarly journals Decaying quantum turbulence in a two-dimensional Bose-Einstein condensate at finite temperature

2020 ◽  
Vol 8 (3) ◽  
Author(s):  
Andrew Groszek ◽  
Matthew Davis ◽  
Tapio Simula
Keyword(s):  
Fixed Point ◽  
Finite Temperature ◽  
Quantum Turbulence ◽  
Einstein Condensate ◽  
Two Dimensional ◽  
Vortex Dipoles ◽  
Dissipative Effects ◽  
Field Methodology ◽  
Initial States ◽  
Bose Einstein

We numerically model decaying quantum turbulence in two-dimensional disk-shaped Bose--Einstein condensates, and investigate the effects of finite temperature on the turbulent dynamics. We prepare initial states with a range of condensate temperatures, and imprint equal numbers of vortices and antivortices at randomly chosen positions throughout the fluid. The initial states are then subjected to unitary time-evolution within the c-field methodology. For the lowest condensate temperatures, the results of the zero temperature Gross--Pitaevskii theory are reproduced, whereby vortex evaporative heating leads to the formation of Onsager vortex clusters characterised by a negative absolute vortex temperature. At higher condensate temperatures the dissipative effects due to vortex--phonon interactions tend to drive the vortex gas towards positive vortex temperatures dominated by the presence of vortex dipoles. We associate these two behaviours with the system evolving toward an anomalous non-thermal fixed point, or a Gaussian thermal fixed point, respectively.

scholarly journals Tunneling in Fermi Systems with Quadratic Band Crossing Points

2020 ◽  
Author(s):  
Ipsita Mandal
Keyword(s):  
Band Structure ◽  
Transport Properties ◽  
Transmission Coefficient ◽  
Potential Barrier ◽  
Fano Factor ◽  
Fermi Systems ◽  
Finite Height ◽  
Normal Metals ◽  
Band Crossing ◽  
Crossing Point

We investigate the tunneling of quasiparticles through a potential barrier of finite height and width, in a system with a band structure consisting of a quadratic band crossing point (QBCP). We compute the results of the transmission coefficient at various incident angles, and also the conductivity and the Fano factor. We discuss the distinguishing signatures of these transport properties in comparison with other semimetals, as well as electrons in normal metals.

Sign in / Sign up

Export Citation Format

Share Document