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Singularities in large deviations of work in quantum quenches

Authors

P. Rotondo

J.



Abstract

We investigate large deviations of the work performed in a quantum quench across two different phases separated by a quantum critical point, using as an example the Dicke model quenched from its superradiant to its normal phase. We extract the distribution of the work from the Loschmidt amplitude and compute for both the corresponding large-deviation forms. Comparing these findings with the predictions of the classification scheme put forward in Gambassi and Silva [Phys. Rev. Lett. 109, 250602 (2012)], we are able to identify a regime which is in fact distinct to the ones identified so far: here the rate function exhibits a nonanalytical point which is a strong indication of the existence of an out-of-equilibrium phase transition in the rare fluctuations of the work.

Citation

Rotondo, P., Minář, J., Garrahan, J. P., Lesanovsky, I., & Marcuzzi, M. (2018). Singularities in large deviations of work in quantum quenches. Physical Review B, 98(18), Article 184303. https://doi.org/10.1103/physrevb.98.184303

Journal Article Type Article
Acceptance Date Oct 24, 2018
Online Publication Date Nov 16, 2018
Publication Date Nov 1, 2018
Deposit Date Dec 3, 2018
Publicly Available Date Dec 3, 2018
Journal Physical Review B
Print ISSN 2469-9950
Electronic ISSN 2469-9969
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 98
Issue 18
Article Number 184303
DOI https://doi.org/10.1103/physrevb.98.184303
Public URL https://nottingham-repository.worktribe.com/output/1357289
Publisher URL https://journals.aps.org/prb/abstract/10.1103/PhysRevB.98.184303
Additional Information ©2018 American Physical Society

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