Lenart Zadnik (Avtor), Marko Ljubotina (Avtor), Žiga Krajnik (Avtor), Enej Ilievski (Avtor), Tomaž Prosen (Avtor)

Povzetek

Introducing a class of SU(2) invariant quantum unitary circuits generating chiral transport, we examine the role of broken space-reflection and time-reversal symmetries on spin-transport properties. Upon adjusting parameters of local unitary gates, the dynamics can be either chaotic or integrable. The latter corresponds to a generalization of the space-time discretized (Trotterized) higher-spin quantum Heisenberg chain. We demonstrate that breaking of space-reflection symmetry results in a drift in the dynamical spin susceptibility. Remarkably, we find a universal drift velocity given by a simple formula, which, at zero average magnetization, depends only on the values of SU(2) Casimir invariants associated with local spins. In the integrable case, the drift velocity formula is confirmed analytically based on the exact solution of thermodynamic Bethe ansatz equations. Finally, by inspecting the large fluctuations of the time-integrated current between two halves of the system in stationary maximum-entropy states, we demonstrate violation of the Gallavotti-Cohen symmetry, implying that such states cannot be regarded as equilibrium ones. We show that the scaled cumulant generating function of the time-integrated current instead obeys a generalized fluctuation relation.

Ključne besede

neravnovesna statistična mehanika;kvantna mehanika;večdelčni sistemi;nonequilibrium statistical mechanics;quantum mechanics;many-body systems;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FMF - Fakulteta za matematiko in fiziko
UDK: 536.9
COBISS: 209100803 Povezava se bo odprla v novem oknu
ISSN: 2691-3399
Št. ogledov: 43
Št. prenosov: 21
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 mehanika;večdelčni sistemi;
Vrsta dela (COBISS): Članek v reviji
Strani: str. 030356-1-030356-26
Letnik: ǂVol. ǂ5
Zvezek: ǂiss. ǂ3
Čas izdaje: 2024
DOI: 10.1103/PRXQuantum.5.030356
ID: 25178477