Experimental verification of quantum discord in continuous-variable states and operational significance of discord consumption
Conference on Lasers and Electro-Optics Europe - Technical Digest 2014-January (2014)
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.Experimental verification of quantum discord in continuous-variable states and operational significance of discord consumption
Optica Publishing Group (2014) fth3a.6
Comment on "quantum szilard engine"
Physical Review Letters 111:18 (2013)
Abstract:
A Comment on the Letter by S. W. Kim, Phys. Rev. Lett. 106, 070401 (2011).PRLTAO0031-900710.1103/PhysRevLett.106.070401 The authors of the Letter offer a Reply. © 2013 American Physical Society.Discord as a consumable resource
Pacific Rim Conference on Lasers and Electro-Optics, CLEO - Technical Digest (2013)
Abstract:
Quantum discord is conjectured to be a more general quantum resource than entanglement. We support this conjecture by showing, via experimental Gaussian optics, that quantum processors can harness discord to perform tasks classical counterparts cannot. © 2013 IEEE.Experimental generation of quantum discord via noisy processes
Physical Review Letters 111:10 (2013)