Genuine correlated coherence

Tristan Kraft, Marco Piani

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)
7 Downloads (Pure)


We introduce a notion of genuine correlated coherence. Such a notion is based on the possibility of concentrating on individual systems the coherence present in a distributed system, by making use of incoherent unitary transformations. We define an entropic quantifier of genuine correlated multipartite coherence for generic mixed states, and we focus on the bipartite pure-state case. In the latter case we derive necessary and sufficient conditions for the possibility of fully localizing the coherence, hence identifying the conditions for genuine correlated bipartite coherence. We analyze in detail the quantitative problem for the case of two-qubit pure states, identifying the states with the largest amount of genuine correlated coherence. Interestingly, such states do not have maximal global coherence nor maximal coherence rank.
Original languageEnglish
Article number414013
Number of pages14
JournalJournal of Physics A: Mathematical and Theoretical
Issue number41
Publication statusPublished - 14 Sep 2018


  • correlated coherence
  • quantum coherence
  • quantum information processing

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