Stochastic resonance of quantum discord

Author(s)
Lee, Chee Kong; Kwek, Leong Chuan; Cao, Jianshu
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Abstract
We study the stochastic resonance of quantum discord (“discord resonance”) in coupled quantum systems and make a comparison with the stochastic resonance of entanglement (“entanglement resonance”). It is found that the discord resonance is much more robust against dephasing noise and thermal effects than the entanglement resonance. We also show that, unlike the entanglement resonance, the level of dissipation at which the discord resonance occurs is not sensitive to dephasing noise. These results suggest that it is easier to detect the discord resonance in actual experiments, where the dephasing noise and temperature are difficult to control.
Date issued
2011-12
URI
http://hdl.handle.net/1721.1/70128
Department
Massachusetts Institute of Technology. Department of Chemistry
Journal
Physical Review A
Publisher
American Physical Society
Citation
Lee, Chee, Leong Kwek, and Jianshu Cao. “Stochastic Resonance of Quantum Discord.” Physical Review A 84.6 (2011):[5 pages]. ©2011 American Physical Society.
Version: Final published version
ISSN
1050-2947
1094-1622
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