Research on Robustness of Steered Quantum Coherence in Various Environments

Abstract

Quantum nonlocality is a very important quantum resource. Different types of quantum correlation can present the quantum nonlocality in varying degrees. In this paper, we investigate the dynamic evolution of steered quantum coherence (SQC) for a system of interacting qubits in contact with various models of the environment, and emphatically compare the robustness of SQC and quantum entanglement (QE). The results show that from the given initially state, due to the decoherence effect, both SQC and QE evolve with time in the form of oscillation. In the process of dynamic evolution, the QE will appear death and rebirth for all different decay modes. Differently, the SQC will not emerge the sudden death or the dark and bright, which shows a stronger robustness than QE. Moreover, we find that, under the long-term limit condition, the SQC will approach the steady value in different decay modes, which provides a reliable resource foundation for the completion of quantum information processing.