Disentanglement and decoherence from classical non-Markovian noise: Random telegraph noise

Abstract

We calculate the two-qubit disentanglement due to classical random telegraph noise using the quasi-Hamiltonian method. This allows us to obtain analytical results even for strong coupling and mixed noise, important when the qubits have tunable working point. We determine when entanglement sudden death and revival occur as functions of qubit working point, noise coupling strength and initial state entanglement. For extended Werner states, we show that the concurrence is related to the difference of two functions: one is related to dephasing and the other longitudinal relaxation. A physical intepretation based on the generalized Bloch vector is given: revival only occurs for strongly-coupled noise and comes from the angular motion of the vector.

11 pages, 7 figures, accepted by QIP

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• Dynamics of quantum correlations in colored environments
• Harnessing non-Markovian quantum memory by environmental coupling
• Distributed correlations and information flows within a hybrid multipartite quantum-classical system
• Effects of classical environmental noise on entanglement and quantum discord
• Entanglement dynamics in superconducting qubits affected by local bistable impurities
• Time-evolution of tripartite quantum discord and entanglement under local and non-local random telegraph noise
• Spectroscopy of cross-correlations of environmental noises with two qubits
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• Open quantum system description of singlet-triplet qubits in quantum dots
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• Non-Markovianity and coherence of a moving qubit inside a leaky cavity
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• Time-evolution of entanglement and quantum discord of bipartite systems subject to 1/f^α noise
• Entanglement robustness via spatial deformation of identical particle wave functions
• Quantum correlations of identical particles subject to classical environmental noise
• Topology of Entanglement Evolution of Two Qubits
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• Disappearance of entanglement: a topological point of view
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• Two-time correlation functions beyond quantum regression theorem: Effect of external noise