Abstract
We introduce a simple and efficient technique to verify quantum discord in unknown Gaussian states and certain class of non-Gaussian states. We show that any separation in the peaks of the marginal distributions of one subsystem conditioned on two different outcomes of homodyne measurements performed on the other subsystem indicates correlation between the corresponding quadratures and hence nonzero quantum discord. We also demonstrate that under certain measurement constraints, discord between bipartite systems can be consumed to encode information that can only be accessed by coherent quantum interaction.
Original language | English |
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Title of host publication | Optics InfoBase Conference Papers |
Place of Publication | San Jose USA |
Publisher | Optica Publishing Group |
Pages | (2 pp) |
Edition | Peer Reviewed |
ISBN (Print) | 9781557529992 |
Publication status | Published - 2014 |
Event | OSA CLEO: QELS_Fundamental Science, CLEO_QELS 2014 - San Jose USA Duration: 1 Jan 2014 → … |
Conference
Conference | OSA CLEO: QELS_Fundamental Science, CLEO_QELS 2014 |
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Period | 1/01/14 → … |
Other | June 8-13 2014 |