Published December 2011 | Version v1
Journal article Metadata-only

Stochastic resonance of quantum discord

Creators

  • 1. Centre for Quantum Technologies, National University of Singapore, 117543 Singapore (Singapore)
  • 2. National Institute of Education and Institute of Advanced Studies, Nanyang Technological University, 637616 Singapore (Singapore)
  • 3. Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

Description

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.

Additional details

Identifiers

DOI
10.1103/PhysRevA.84.062113;

Publishing Information

Journal Title
Physical Review. A
Journal Volume
84
Journal Issue
6
Journal Page Range
p. 062113-062113.5
ISSN
1050-2947
CODEN
PLRAAN

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
44053687
Subject category
S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
Descriptors DEI
COMPARATIVE EVALUATIONS; NOISE; QUANTUM ENTANGLEMENT; QUANTUM MECHANICS; RESONANCE; STOCHASTIC PROCESSES; TEMPERATURE DEPENDENCE
Descriptors DEC
EVALUATION; MECHANICS

Optional Information

Notes
(c) 2011 American Institute of Physics