Skip to main content

Research Repository

Advanced Search

Frozen quantum coherence

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

Authors

Thomas R. Bromley

Marco Cianciaruso



Abstract

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.

Journal Article Type Article
Publication Date May 27, 2015
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
APA6 Citation Bromley, T. R., Cianciaruso, M., & Adesso, G. (2015). Frozen quantum coherence. Physical Review Letters, 114(21), https://doi.org/10.1103/PhysRevLett.114.210401
DOI https://doi.org/10.1103/PhysRevLett.114.210401
Publisher URL https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.114.210401
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information © 2015 American Physical Society

Files

15PRL_114_210401.pdf (251 Kb)
PDF

Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





You might also like



Downloadable Citations

;