Quantum Steering And Quantum Coherence Of Open Quantum Systems In Accelerated Frames

Theory of relativity and quantum mechanics are known as the two pillars of modern physics.In the past years,the evolution of quantum correlations in the relativistic setting has been investigated extensively.It has been shown that quantum resources can induce novel and qualitative features in a relativistic setting.Some quantum information processing tasks related to quantum correlations under relativistic framework have been studied,but there are still insufficient.Surrounding these topics,this thesis had studied quantum steering and quantum coherence of open quantum systems in accelerated frames.The contents are as follows:1.We have studied the dynamics of quantum steering of open quantum systems in accelerated frames.Quantum steering between two-mode Dirac fields in the non-inertial frame and interact with two independent thermal baths.We find that both the two effects reduce quantum steering and induce generally steering asymmetry.However,different cooperative effects arise: for the decays of quantum steering itself,the two effects are always constructive;for the asymmetry of steering,however,they have different behaviors depending on the feature of thermal baths and are generally destructive.2.We have studied the quantum coherence of tripartite GHZ and W states under local amplitude-damping environments and for two accelerated observers.We also extend the investigation to the N-partite systems.It is demonstrated that environmental noise has stronger influence on quantum coherence than Unruh effect.Moreover,W state is more robust against noise than GHZ state.For the given decaying parameters and accelerated parameters,the coherence of N-partite GHZ state is a decreasing function of N,but an increasing function of N for N-partite W state.N-partite W state has very stronger robustness in resistingenvironmental noise.