Between entropy and subentropy

  • Authors:

  • Sarah R. Nichols;William K. Wootters

  • Affiliations:

  • Department of Physics, Williams College, Williamstown, Massachusetts;Department of Physics, Williams College, Williamstown, Massachusetts

  • Venue:
  • Quantum Information & Computation
  • Year:
  • 2003

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Abstract

The von Neumann entropy and the subentropy of a mixed quantum state are upper and lower bounds, respectively, on the accessible information of any ensemble consistent with the given mixed state. Here we define and investigate a set of quantities intermediate between entropy and subentropy.