Quantum discord dynamical behaviors due to initial system-cavity correlations

Abstract

We analyze the roles of initial correlations between the two-qubit system and a dissipative cavity on quantum discord dynamics of two qubits. Considering two initial system-cavity states, we show that the initial system-cavity correlations not only can initially increase the two-qubit quantum discord but also would lead to a larger long-time quantum discord asymptotic value. Moreover, quantum discord due to initial correlations is more robust than the case of the initial factorized state. Finally, we show the initial correlations' importance for dynamics behaviors of mutual information and classical correlation.

References in corpus (8)

• Finite-Time Disentanglement via Spontaneous Emission
• Quantum discord and the power of one qubit
• Experimental quantum computing without entanglement
• Robustness of quantum discord to sudden death
• Classical and quantum correlations under decoherence
• Vanishing quantum discord is necessary and sufficient for completely positive maps
• Sudden death and sudden birth of entanglement in common structured reservoirs
• Non-Markovian entanglement dynamics in the presence of system-bath coherence

Cited by in corpus (5)

• The classical-quantum boundary for correlations: discord and related measures
• Quantum discord and its allies: a review
• Purity as a witness for initial system-environment correlations in open-system dynamics
• Quantum correlations in a noisy neutron interferometer
• Quantum correlations dynamics under different non-markovian environmental models