Remanent quantum correlations in dissipative qubits

Marco Nizama and Manuel O. Cáceres

Physica A: Statistical Mechanics and its Applications, 2013, vol. 392, issue 23, 6155-6160

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.

Keywords: Quantum Walk; Master equation; Non-Markovian decoherence; Quantum correlations; Qubits (search for similar items in EconPapers)
Date: 2013
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:392:y:2013:i:23:p:6155-6160

DOI: 10.1016/j.physa.2013.07.055

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