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Nonlinear spectroscopy of random quantum magnets

Abstract:

We study nonlinear response in quantum spin systems near infinite-randomness critical points. Nonlinear dynamical probes, such as two-dimensional (2D) coherent spectroscopy, can diagnose the nearly localized character of excitations in such systems. We present exact results for nonlinear response in the 1D random transverse-field Ising model, from which we extract information about critical behavior that is absent in linear response. Our analysis yields exact scaling forms for the distributio...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/PhysRevLett.125.237601

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Theoretical Physics
Oxford college:
Hertford College
Role:
Author
Publisher:
American Physical Society Publisher's website
Journal:
Physical Review Letters Journal website
Volume:
125
Issue:
23
Article number:
237601
Publication date:
2020-12-02
Acceptance date:
2020-10-21
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Language:
English
Keywords:
Pubs id:
1138075
Local pid:
pubs:1138075
Deposit date:
2020-10-21

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