Accesible coherence in open quantum system dynamics

Research output: Contribution to journalResearch articleContributedpeer-review


  • María García Díaz - (Author)
  • Desef Benjamin - (Author)
  • Matteo Rosati - (Author)
  • Dario Egloff - , TUD Dresden University of Technology, Ulm University (Author)
  • John Calsamiglia - (Author)
  • Andrea Smirne - (Author)
  • Michaelis Skotiniotis - (Author)
  • Susana F. Huelga - (Author)


Quantum coherence generated in a physical process can only be cast as a potentially useful resource if its effects can be detected at a later time. Recently, the notion of non-coherence-generating-and-detecting (NCGD) dynamics has been introduced and related to the classicality of the statistics associated with sequential measurements at different times. However, in order for a dynamics to be NCGD, its propagators need to satisfy a given set of conditions for all triples of consecutive times. We reduce this to a finite set of d(d−1) conditions, where d is the dimension of the quantum system, provided that the generator is time-independent. Further conditions are derived for the more general time-dependent case. The application of this result to the case of a qubit dynamics allows us to elucidate which kind of noise gives rise to non-coherence-generation-and-detection.


Original languageEnglish
Number of pages11
JournalThe Open Journal for Quantum Science
Issue number249
Publication statusPublished - 2 Apr 2020



  • open quantum system dynamics