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Eigenstate correlations, thermalization, and the butterfly effect

Abstract:
We discuss eigenstate correlations for ergodic, spatially extended many-body quantum systems, in terms of the statistical properties of matrix elements of local observables. While the eigenstate thermalization hypothesis (ETH) is known to give an excellent description of these quantities, the phenomenon of scrambling and the butterfly effect imply structure beyond ETH. We determine the universal form of this structure at long distances and small eigenvalue separations for Floquet systems. We use numerical studies of a Floquet quantum circuit to illustrate both the accuracy of ETH and the existence of our predicted additional correlations.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/PhysRevLett.122.220601

Authors


More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics
Sub department:
Theoretical Physics
Role:
Author
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Oxford college:
St Hugh's College
Role:
Author
ORCID:
0000-0003-4369-6071


Publisher:
American Physical Society
Journal:
Physical Review Letters More from this journal
Volume:
122
Issue:
22
Article number:
220601
Publication date:
2019-06-07
Acceptance date:
2019-05-11
DOI:
EISSN:
1079-7114
ISSN:
0031-9007


Pubs id:
pubs:1015579
UUID:
uuid:2db62c4f-30c0-40ac-840a-d6ce0643ab5c
Local pid:
pubs:1015579
Source identifiers:
1015579
Deposit date:
2019-06-17

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