Effects of classical environmental noise on entanglement and quantum discord

Abstract

We address the effect of classical noise on the dynamics of quantum correlations, entanglement and quantum discord, of two non-interacting qubits initially prepared in a Bell state. The effect of noise is modeled by randomizing the single-qubit transition amplitudes. We address both static and dynamic environmental noise corresponding to interaction with separate common baths in either Markovian and non-Markovian regimes. In the Markov regime, a monotone decay of the quantum correlations is found, whereas for non-Markovian noise sudden death and revival phenomena may occur, depending on the characteristics of the noise. Entanglement and quantum discord show the same qualitative behavior for all kind of noises considered. On the other hand, we find that separate and common environments may play opposite roles in preserving quantum correlations, depending on the noise regime considered.

10 pages, 6 figures

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• Engineering decoherence for two-qubit systems interacting with a classical environment
• Non-Markovian continuous-time quantum walks on lattices with dynamical noise
• Effects of classical fluctuating environments on decoherence and bipartite quantum correlations dynamics
• Collapse and revival of quantum coherence for a harmonic oscillator interacting with a classical fluctuating environment
• Effective dephasing for a qubit interacting with a transverse classical field
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• Quantumness and memory of one qubit in a dissipative cavity under classical control
• Overview on the phenomenon of two-qubit entanglement revivals in classical environments
• Time-evolution of entanglement and quantum discord of bipartite systems subject to 1/f^α noise
• Quantum correlations of identical particles subject to classical environmental noise
• Qubit systems subject to unbalanced random telegraph noise: quantum correlations, non-Markovianity and teleportation
• Classical memoryless noise-induced maximally discordant mixed separable steady states
• Discord and entanglement in non-Markovian environments at finite temperature
• A stochastic model of the influence of buffer gas collisions on Mollow spectra
• Probing multipartite entanglement, coherence and quantum information preservation under classical Ornstein-Uhlenbeck noise
• Experimental realization of local-to-global noise transition in a two-qubit optical simulator
• Multiclass classification of dephasing channels