Structural stability hypothesis of dual unitary quantum chaos

Riddell, Jonathon (avtor), Keyserlingk, Curt von (avtor), Prosen, Tomaž (avtor), Bertini, Bruno (avtor)

Having spectral correlations that, over small enough energy scales, are described by random matrix theory is regarded as the most general defining feature of quantum chaotic systems as it applies in the many-body setting and away from any semiclassical limit. Although this property is extremely difficult to prove analytically for generic many-body systems, a rigorous proof has been achieved for dual-unitary circuits—a special class of local quantum circuits that remain unitary upon swapping space and time. Here we consider the fate of this property when moving from dual-unitary to generic quantum circuits focusing on the spectral form factor, i.e., the Fourier transform of the two-point correlation. We begin with a numerical survey that, in agreement with previous studies, suggests that there exists a finite region in parameter space where dual-unitary physics is stable and spectral correlations are still described by random matrix theory, although up to a maximal quasienergy scale. To explain these findings, we develop a perturbative expansion: it recovers the random matrix theory predictions, provided the terms occurring in perturbation theory obey a relatively simple set of assumptions. We then provide numerical evidence and a heuristic analytical argument supporting these assumptions.

• Jezik: Angleški jezik
• Ključne besede: quantum chaos, quantum many-body systems, quantum physics, statistical physics
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2024
• Št. strani: Str. 033226-1-033226-21
• Številčenje: Vol. 6, iss. 3
• PID: 20.500.12556/RUL-168179
• UDK: 530.145
• ISSN pri članku: 2643-1564
• DOI: 10.1103/PhysRevResearch.6.033226
• COBISS.SI-ID: 231006723
• Datum objave v RUL: 01.04.2025

RIDDELL, Jonathon, KEYSERLINGK, Curt von, PROSEN, Tomaž in BERTINI, Bruno, 2024, Structural stability hypothesis of dual unitary quantum chaos. Physical review research [na spletu]. 2024. Vol. 6, no. 3, p. 033226-1- 033226–21. [Dostopano 8 april 2025]. DOI 10.1103/PhysRevResearch.6.033226. Pridobljeno s: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=slv&id=168179

Gradivo je del revije

• Naslov: Physical review research
• Založnik: American Phyisical Society
• ISSN: 2643-1564
• COBISS.SI-ID: 32822823

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: kvantni kaos, kvantni večdelčni sistemi, kvantna fizika, statistična fizika