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  Dynamics of quantum coherence and quantum Fisher information after a sudden quench

Jafari, R., & Akbari, A. (2020). Dynamics of quantum coherence and quantum Fisher information after a sudden quench. Physical Review A, 101(6): 062105, pp. 1-9. doi:10.1103/PhysRevA.101.062105.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-9FD5-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-9FD7-5
Genre: Journal Article

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 Creators:
Jafari, R.1, Author
Akbari, Alireza2, Author              
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              

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 Abstract: The dynamics of relative entropy and l(1) norm of coherence, as well as, the Wigner-Yanase skew and quantum Fisher information are studied in the one-dimensional XY spin chain in the presence of a time-dependent transverse magnetic field. We show that, independent of the initial state of the system and while the relative entropy of coherence, the l(1) norm of coherence, and quantum Fisher information are incapable, surprisingly, the Wigner-Yanase skew information dynamic can truly spotlight the equilibrium critical point. We also observe that, when the system is quenched to the critical point, these quantities show suppressions and revivals. Moreover, the first suppression (revival) time scales linearly with the system size and its scaling ratio is unique for all quenches independent of the initial phase of the system. This is the promised universality of the first suppression (revival) time.

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Language(s): eng - English
 Dates: 2020-06-082020-06-08
 Publication Status: Published in print
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Title: Physical Review A
  Other : Physical Review A: Atomic, Molecular, and Optical Physics
  Other : Phys. Rev. A
Source Genre: Journal
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Publ. Info: New York, NY : American Physical Society
Pages: - Volume / Issue: 101 (6) Sequence Number: 062105 Start / End Page: 1 - 9 Identifier: ISSN: 1050-2947
CoNE: https://pure.mpg.de/cone/journals/resource/954925225012_2