Information fluctuation theorem for an open quantum bipartite system. Academic Article uri icon


  • We study an arbitrary nonequilibrium dynamics of a quantum bipartite system coupled to a reservoir. For its characterization, we present a fluctuation theorem (FT) that explicitly addresses the quantum correlation of subsystems during the thermodynamic evolution. To our aim, we designate the local and the global states altogether in the time-forward and the time-reversed transition probabilities. In view of the two-point measurement scheme, only the global states are subject to measurements whereas the local states are used only as an augmented information on the composite system. We specifically derive a FT in such a form that relates the entropy production of local systems in the time-forward transition to the change of quantum correlation in the time-reversed transition. This also leads to a useful thermodynamic inequality and we illustrate its advantage by an example of an isothermal process on Werner states.

published proceedings

  • Phys Rev E

altmetric score

  • 0.25

author list (cited authors)

  • Park, J. J., Nha, H., Kim, S. W., & Vedral, V.

citation count

  • 7

complete list of authors

  • Park, Jung Jun||Nha, Hyunchul||Kim, Sang Wook||Vedral, Vlatko

publication date

  • May 2020