Dynamics of magnetization at infinite temperature in a Heisenberg spin chain

Rosenberg, E. (avtor), Prosen, Tomaž (avtor)

Understanding universal aspects of quantum dynamics is an unresolved problem in statistical mechanics. In particular, the spin dynamics of the one-dimensional Heisenberg model were conjectured as to belong to the Kardar-Parisi-Zhang (KPZ) universality class based on the scaling of the infinite-temperature spin-spin correlation function. In a chain of 46 superconducting qubits, we studied the probability distribution of the magnetization transferred across the chain’s center, $P(\mathscr{M})$. The first two moments of $P(\mathscr{M})$ show superdiffusive behavior, a hallmark of KPZ universality. However, the third and fourth moments ruled out the KPZ conjecture and allow for evaluating other theories. Our results highlight the importance of studying higher moments in determining dynamic universality classes and provide insights into universal behavior in quantum systems.

• Jezik: Angleški jezik
• Ključne besede: quantum physics, transport phenomena, Heisenberg spin chains, statistical mechanics, magnetization
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FMF - Fakulteta za matematiko in fiziko
• Različica publikacije: Recenzirani rokopis
• Datum objave: 04.04.2024
• Leto izida: 2024
• Št. strani: Str. 48–53
• Številčenje: Vol. 384, no. 6691
• PID: 20.500.12556/RUL-155596
• UDK: 530.145
• ISSN pri članku: 0036-8075
• DOI: 10.1126/science.adi7877
• COBISS.SI-ID: 191659011
• Datum objave v RUL: 08.04.2024

Gradivo je del revije

• Naslov: Science
• Skrajšan naslov: Science
• Založnik: American Association for the Advancement of Science
• ISSN: 0036-8075
• COBISS.SI-ID: 2908687

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: kvantna fizika, transportni pojavi, Heisenbergove spinske verige, statistična mehanika, magnetizacija

Projekti

• Financer: ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
• Številka projekta: P1-0402-2019
• Naslov: Matematična fizika