Research On Quantum Fisher Information Tensor And Scalar Curvature In Dynamic Casimir Effect

In 1970,people first proposed the dynamic Casimir effect,that is,the photon produced by vacuum disturbance,which is one of the greatest predictions in the history of quantum electrodynamics.Since then,many scientists have been working hard to observe the dynamic Casimir effect.Until 2011,Wilson et al.used the superconducting quantum interferometer(SQUID)to interrupt the superconducting waveguide transmission line and increased the external magnetic flux of the superconducting quantum interferometer(SQUID).The method of frequency modulation realizes the experimental observation of the dynamic Casimir effect.Casimir effect has very important applications in many fields such as mathematical physics,condensed matter physics,biology,astronomy and cosmology,especially in nanotechnology.Studies have shown that the effective motion induced by the magnetic field produces microwave photon pairs in a vacuum state,and the resulting photon pairs show quantum entanglement and quantum disharmony,quantum correlation can be converted into superconducting qubits.It is a meaningful work to study how to use the dynamic Casimir effect to produce other practical quantum properties.In this paper,we study the influence of dissipation on quantum entanglement and scalar curvature in a superconducting waveguide in a dissipative system.We have obtained the expressions of Fisher information tensor and scalar curvature in the dynamic Casimir effect,and discussed the influence of misalignment,temperature,coupling coefficient and normalized amplitude on Fisher information tensor and scalar curvature through numerical analysis.Studies have shown that a certain temperature selected,only detuning drive amplitude can be more effective in maintaining the non-classical correlation system,and can improve the effective quantum resources.In addition,if the damping of the second noise channel is much greater than that of the first channel,the entanglement can be maintained for a longer time,the Gaussian power can be increased more effectively,and the Fisher information and scalar curvature are more sensitive to other environmental parameters.The research results have certain reference value for us to further study the application of dynamic Casimir effect to quantum information in the future.