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Remanent quantum correlations in dissipative qubits

Author

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  • Nizama, Marco
  • Cáceres, Manuel O.

Abstract

Starting from the exact evolution of a Markovian dissipative quantum walk, a non-Markovian decoherence of two qubits interacting with a phonon thermal bath has been investigated analytically using quantum information tools. Concurrence and quantum discord are affected in a complex way, showing that entanglement decreases with dissipation. At the limit where dissipation dominates, quantum correlations survive in time as ∝t−1/2. Thus, even under the influence of dissipation, two qubits retain their quantumness for a long time. Quantum correlations could be therefore observed for a long time in related photonic experiments.

Suggested Citation

  • Nizama, Marco & Cáceres, Manuel O., 2013. "Remanent quantum correlations in dissipative qubits," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 392(23), pages 6155-6160.
  • Handle: RePEc:eee:phsmap:v:392:y:2013:i:23:p:6155-6160
    DOI: 10.1016/j.physa.2013.07.055
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