Discord as a quantum resource for bi-partite communication

Helen M. Chrzanowski, Mile Gu, Syed M. Assad, Thomas Symul, Kavan Modi, Timothy C. Ralph, Vlatko Vedral, Ping Koy Lam

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

Abstract

Coherent interactions that generate negligible entanglement can still exhibit unique quantum behaviour. This observation has motivated a search beyond entanglement for a complete description of all quantum correlations. Quantum discord is a promising candidate. Here, we experimentally demonstrate that under certain measurement constraints, discord between bipartite systems can be consumed to encode information that can only be accessed by coherent quantum interactions. The inability to access this information by any other means allows us to use discord to directly quantify this 'quantum advantage'.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
Subtitle of host publication11th International Conference on Quantum Communication, Measurement and Computation
EditorsHannes-Jörg Schmiedmayer , Philip Walther
PublisherAmerican Institute of Physics
Pages116-118
Number of pages3
Volume1633
ISBN (Electronic)9780735412729
DOIs
Publication statusPublished - 2014
Externally publishedYes
EventInternational Conference on Quantum Communication, Measurement and Computing (QCMC) 2012 - Vienna, Austria
Duration: 30 Jul 20123 Aug 2012
Conference number: 11th
http://qcmc2012.org/

Publication series

NameAIP Conference Proceedings
PublisherAmerican Institute of Physics Inc.
Number1
Volume1633
ISSN (Print)0094-243X

Conference

ConferenceInternational Conference on Quantum Communication, Measurement and Computing (QCMC) 2012
Abbreviated titleQCMC 2012
CountryAustria
CityVienna
Period30/07/123/08/12
Internet address

Keywords

  • discord
  • quantum correlations
  • quantum information

Cite this

Chrzanowski, H. M., Gu, M., Assad, S. M., Symul, T., Modi, K., Ralph, T. C., Vedral, V., & Lam, P. K. (2014). Discord as a quantum resource for bi-partite communication. In H-J. Schmiedmayer , & P. Walther (Eds.), AIP Conference Proceedings: 11th International Conference on Quantum Communication, Measurement and Computation (Vol. 1633, pp. 116-118). (AIP Conference Proceedings; Vol. 1633, No. 1). American Institute of Physics. https://doi.org/10.1063/1.4903110