Scrambling and entanglement spreading in long-range spin chains

Pappalardi, Silvia (author), Russomanno, Angelo (author), Žunkovič, Bojan (author), Iemini, Fernando (author), Silva, Alessandro (author), Fazio, Rosario (author)

We study scrambling in connection with multipartite entanglement dynamics in regular and chaotic long-range spin chains, characterized by a well-defined semi-classical limit. For regular dynamics, scrambling and entanglement dynamics are found to be very different: up to the Ehrenfest time, they rise side by side, departing only afterward. Entanglement saturates and becomes extensively multipartite, while scrambling, characterized by the dynamic of the square commutator of initially commuting variables, continues its growth up to the recurrence time. Remarkably, the exponential growth of the latter emerges not only in the chaotic case but also in the regular one, when the dynamics occurs at a dynamical critical point.

• Language: English
• Keywords: quantum statistical mechanics, quantum mechanics, quantum entanglement
• Typology: 1.01 - Original Scientific Article
• Organization: FMF - Faculty of Mathematics and Physics
• Publication status: Published
• Publication version: Author Accepted Manuscript
• Year: 2018
• Number of pages: Str. 134303-1-134303-11
• Numbering: Vol. 98, iss. 13
• PID: 20.500.12556/RUL-105234
• UDC: 536.93
• ISSN on article: 2469-9950
• DOI: 10.1103/PhysRevB.98.134303
• COBISS.SI-ID: 3264100
• Publication date in RUL: 13.11.2018

Record is a part of a journal

• Title: Physical review
• Publisher: American Physical Society
• ISSN: 2469-9950
• COBISS.SI-ID: 2997348

Secondary language

• Language: Slovenian
• Keywords: kvantna statistična mehanika, kvantna mehanika, kvantna prepletenost

Projects

• Funder: EC - European Commission
• Funding programme: H2020
• Project number: 694544
• Name: Open many-body non-equilibrium systems
• Acronym: OMNES