Please use this identifier to cite or link to this item:
Title: Observing the operational significance of discord consumption
Authors: Gu, M.
Chrzanowski, H.M.
Assad, S.M.
Symul, T.
Modi, K. 
Ralph, T.C.
Vedral, V. 
Lam, P.K.
Issue Date: Sep-2012
Source: Gu, M., Chrzanowski, H.M., Assad, S.M., Symul, T., Modi, K., Ralph, T.C., Vedral, V., Lam, P.K. (2012-09). Observing the operational significance of discord consumption. Nature Physics 8 (9) : 671-675. ScholarBank@NUS Repository.
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 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'. We experimentally encode information within the discordant correlations of two separable Gaussian states. The amount of extra information recovered by coherent interaction is quantified and directly linked with the discord consumed during encoding. No entanglement exists at any point of this experiment. Thus we introduce and demonstrate an operational method to use discord as a physical resource. © 2012 Macmillan Publishers Limited. All rights reserved.
Source Title: Nature Physics
ISSN: 17452473
DOI: 10.1038/nphys2376
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Feb 15, 2018


checked on Jan 29, 2018

Page view(s)

checked on Feb 19, 2018

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.