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Frozen quantum coherence

Bromley, Thomas R.; Cianciaruso, Marco; Adesso, Gerardo

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Thomas R. Bromley

Marco Cianciaruso


We analyze under which dynamical conditions the coherence of an open quantum system is totally unaffected by noise. For a single qubit, specific measures of coherence are found to freeze under different conditions, with no general agreement between them. Conversely, for an N-qubit system with even N, we identify universal conditions in terms of initial states and local incoherent channels such that all bona fide distance-based coherence monotones are left invariant during the entire evolution. This finding also provides an insightful physical interpretation for the freezing phenomenon of quantum correlations beyond entanglement. We further obtain analytical results for distance-based measures of coherence in two-qubit states with maximally mixed marginals.


Bromley, T. R., Cianciaruso, M., & Adesso, G. (2015). Frozen quantum coherence. Physical Review Letters, 114(21), Article 210401.

Journal Article Type Article
Acceptance Date Mar 27, 2015
Publication Date May 27, 2015
Deposit Date Oct 11, 2017
Publicly Available Date Oct 11, 2017
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 114
Issue 21
Article Number 210401
Public URL
Publisher URL
Additional Information © 2015 American Physical Society


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