Based-nonequilibrium-environment non-Markovianity, quantum Fisher information and quantum coherence

Abstract

In this work, we investigate the non-Markovianity, quantum Fisher information (QFI) and quantum coherence of a qubit in a nonequilibrium environment and have obtained the expressions of QFI and quantum coherence as well as their relationship. We have also discussed in detail the influences of the different noise parameters on these quantum sffects. The results show that the suitable parameters of the nonequilibrium environment can retard the QFI and quantum coherence in both Markovian and non-Markovian regions. In addition, the smaller memory effects and the larger the jumping rate, the greater the QFI and quantum coherence. And a larger QFI naturally corresponds to a larger quantum coherence, which indicates that the quantum coherence can enlarge the QFI and can effectively enhance the quantum metrology.

References in corpus (19)

• Quantifying Coherence
• Quantum metrology
• Quantum Coherence as a Resource
• Measure for the Degree of Non-Markovian Behavior of Quantum Processes in Open Systems
• Entanglement and non-Markovianity of quantum evolutions
• Quantum Metrology in Non-Markovian Environments
• Quantum Fisher Information Flow in Non-Markovian Processes of Open Systems
• Coherence as a resource in decision problems: The Deutsch-Jozsa algorithm and a variation
• An effective method of calculating the non-Markovianity $\mathcal{N}$ for single channel open systems
• Quantum interference and phonon-mediated back-action in lateral quantum dot circuits
• Steady-state entanglement and coherence of the coupled qubit system in equilibrium and nonequilibrium environments
• Refined Weak Coupling Limit: Coherence, Entanglement and Non-Markovianity
• Telegraph Noise in Coupled Quantum Dot Circuits Induced by a Quantum Point Contact
• Practical Quantum Metrology in Noisy Environments
• The l1 Norm of Coherence of Assistance
• Enhancing coherence of a state by stochastic strictly incoherent operations
• Optimal distillation of quantum coherence with reduced waste of resources
• The role of coherence during classical and quantum decoherence
• Coherent exciton dynamics in a dissipative environment maintained by an off-resonant vibrational mode