Márton Mestyán (Avtor), Bruno Bertini (Avtor), Lorenzo Piroli (Avtor), Pasquale Calabrese (Avtor)

Povzetek

We study the transport properties of a one-dimensional spinful Fermi gas, after a junction of two semi-infinite subsystems held at different temperatures. The ensuing dynamics is studied by analyzing the space-time profiles of local observables emerging at large distances x and times t, as a function of ζ = x/t. At equilibrium, the system displays two distinct species of quasiparticles, naturally associated with different physical degrees of freedom. By employing the generalized hydrodynamic approach, we show that when the temperatures are finite no notion of separation can be attributed to the quasiparticles. In this case, the profiles can not be qualitatively distinguished by those associated to quasiparticles of a single species that can form bound states. On the contrary, signatures of separation emerge in the low-temperature regime, where two distinct characteristic velocities appear. In this regime, we analytically show that the profiles display a piecewise constant form and can be understood in terms of two decoupled Luttinger liquids.

Ključne besede

neravnovesna statistična mehanika;kvantna statistična mehanika;Fermijev plin;nonequilibrium statistical mechanics;quantum statistical mechanics;Fermi gas;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FMF - Fakulteta za matematiko in fiziko
UDK: 536.93
COBISS: 3313252 Povezava se bo odprla v novem oknu
ISSN: 2469-9950
Št. ogledov: 691
Št. prenosov: 460
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: neravnovesna statistična mehanika;kvantna statistična mehanika;Fermijev plin;
Strani: str. 014305-1-014305-19
Letnik: ǂVol. ǂ99
Zvezek: ǂiss. ǂ1
Čas izdaje: 2019
DOI: 10.1103/PhysRevB.99.014305
ID: 11146009