Improved entropic uncertainty relations and information exclusion relations

Patrick J. Coles, Marco Piani

Research output: Contribution to journalArticlepeer-review

126 Citations (Scopus)
80 Downloads (Pure)


The uncertainty principle can be expressed in entropic terms, also taking into account the role of entanglement in reducing uncertainty. The information exclusion principle bounds instead the correlations that can exist between the outcomes of incompatible measurements on one physical system, and a second reference system. We provide a more stringent formulation of both the uncertainty principle and the information exclusion principle, with direct applications for, e.g., the security analysis of quantum key distribution, entanglement estimation, and quantum communication. We also highlight a fundamental distinction between the complementarity of observables in terms of uncertainty and in terms of information
Original languageEnglish
Article number022112
Number of pages11
JournalPhysical Review A
Publication statusPublished - 18 Feb 2014


  • entanglement
  • quantum key distribution
  • entanglement estimation
  • quantum communication

Cite this