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Proposal for measuring the finite-temperature Drude weight of integrable systems
Karrasch, Christoph (Author), Prosen, Tomaž (Author), Heidrich-Meisner, Fabian (Author)

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Abstract
Integrable models such as the spin-1/2 Heisenberg chain, the Lieb-Liniger, or the one-dimensional Hubbard model are known to avoid thermalization, which was also demonstrated in several quantum-quench experiments. Another dramatic consequence of integrability is the zero-frequency anomaly in transport coefficients, which results in ballistic finite-temperature transport, despite the presence of strong interactions. While this aspect of nonergodic dynamics has been known for a long time, there has so far not been any unambiguous experimental realization thereof. We make a concrete proposal for the observation of ballistic transport via local quantum-quench experiments in fermionic quantum-gas microscopes. Such an experiment would also unveil the coexistence of ballistic and diffusive transport channels in one and the same system and provide a means of measuring finite-temperature Drude weights. The connection between local quenches and linear-response functions is established via time-dependent Einstein relations.

Language:English
Keywords:quantum mechanics
Tipology:1.01 - Original Scientific Article
Organization:FMF - Faculty of Mathematics and Physics
Year:2017
Publisher:American Physical Society
Number of pages:Str. 060406-1-060406-6
Numbering:Vol. 95, iss. 6
UDC:530.145
ISSN on article:2469-9950
DOI:10.1103/PhysRevB.95.060406 This link opens in a new window
COBISS.SI-ID:3106148 This link opens in a new window
Copyright:American Physical Society
Views:865
Downloads:653
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Record is a part of a journal

Title:Physical review
Publisher:American Physical Society
ISSN:2469-9950
COBISS.SI-ID:2997348 This link opens in a new window

Document is financed by a project

Funder:EC - European Commission
Funding Programme:H2020
Project no.:694544
Name:Open many-body non-equilibrium systems
Acronym:OMNES

Secondary language

Language:Slovenian
Keywords:kvantna mehanika

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