Superdiffusive magnetization transport in the XX spin chain with nonlocal dephasing

Žnidarič, Marko (author)

We study a recently discussed XX spin chain with nonlocal dephasing [Y.-P. Wang etal., arXiv:2310.03069] in a steady-state boundary-driven setting, confirming superdiffusive magnetization transport in the thermodynamic limit. The emergence of superdiffusion is rather interesting as the Lindblad operators causing it are a coherent sum of two terms, each of which would separately cause diffusion. One therefore has a quantum phenomenon where a coherent sum of two diffusive terms results in superdiffusion. We also study perturbations of the superdiffusive model, finding that breaking the exact form of dissipators, as well as adding interactions to the XXchain, results in superdiffusion changing into diffusion.

• Language: English
• Keywords: condensed matter physics, statistical physics, quantum spin chains, nonequilibrium systems
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FMF - Faculty of Mathematics and Physics
• Publication version: Author Accepted Manuscript
• Publication date: 05.02.2024
• Year: 2024
• Number of pages: Str. 075105-1-075105-9
• Numbering: Vol. 109, iss. 7
• PID: 20.500.12556/RUL-155056
• UDC: 538.9
• ISSN on article: 2469-9950
• DOI: 10.1103/PhysRevB.109.075105
• COBISS.SI-ID: 188677379
• Publication date in RUL: 18.03.2024

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: fizika kondenzirane snovi, statistična fizika, kvantne spinske verige, neravnovesni sistemi

Projects

• Funder: ARIS - Slovenian Research and Innovation Agency
• Project number: J1-4385
• Name: Kvantna večdelčna fizika in nehermitskost

• Funder: ARIS - Slovenian Research and Innovation Agency
• Project number: P1-0402
• Name: Matematična fizika