Quantum information transfer and models for black hole mechanics

May, 2012
14 pages
Published in:
  • Phys.Rev.D 87 (2013) 6, 064031
  • Published: Mar 21, 2013
e-Print:
Report number:
  • NSF-KITP-12-098

Citations per year

20122015201820212024051015
Abstract: (APS)
General features of information transfer between quantum subsystems, via unitary evolution, are investigated, with applications to the problem of information transfer from a black hole to its surroundings. A particularly direct form of quantum information transfer is “subsystem transfer,” which can be characterized by the saturation of a subadditivity inequality. We also describe more general unitary quantum information transfer, and categorize different models for black hole evolution. Evolution that only creates paired excitations inside/outside the black hole is shown not to extract information, but information-transferring models exist both in the “saturating” and “nonsaturating” category. The former more closely capture thermodynamic behavior; the latter generically have an enhanced energy flux, beyond that of Hawking.
Note:
  • 31 pages, harvmac. v2: nomenclature change, minor added explanation. v3: small corrections/rewordings; improved figure; version to match publication in PRD
  • 04.60.-m
  • 03.67.-a
  • 03.65.Ud
  • 04.70.Dy
  • energy: flux
  • unitarity
  • saturation
  • radiation: Hawking
  • black hole: entropy
  • correlation