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Non-analytic behavior of the Loschmidt echo in XXZ spin chains: Exact results

Abstract:

We address the computation of the Loschmidt echo in interacting integrable spin chains after a quantum quench. We focus on the massless regime of the XXZ spin-1/2 chain and present exact results for the dynamical free energy (Loschmidt echo per site) for a special class of integrable initial states. For the first time we are able to observe and describe points of non-analyticities using exact methods, by following the Loschmidt echo up to large real times. The dynamical free energy is compute...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1016/j.nuclphysb.2018.06.015

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Role:
Author
ORCID:
0000-0002-0107-3338
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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author
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Funding agency for:
Vernier, E
Grant:
EP/N01930X
Publisher:
Elsevier
Journal:
Nuclear Physics B More from this journal
Volume:
933
Pages:
454-481
Publication date:
2018-06-22
Acceptance date:
2018-06-19
DOI:
EISSN:
1873-1562
ISSN:
0550-3213
Keywords:
Pubs id:
pubs:869582
UUID:
uuid:d4b6a670-8ebd-48c7-8295-9250bffb7bf3
Local pid:
pubs:869582
Source identifiers:
869582
Deposit date:
2018-08-28

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