4 papers
Parameter estimation and quantum entanglement in PT symmetrical cavity magnonics system
Dong Xie, Chunling Xu, An min Wang
We investigate the parameter estimation in a magnon-cavity-magnon coupled system. PT symmetrical two magnons system can be formed in the gain magnetic materials by the adiabatic el…
Enhancing parameter estimation precision in dissipative environment with two-photon driving
Dong Xie, Chunling Xu
We investigate the frequency estimation of an optical field suffering from an unavoidable dissipative environment. Generally, dissipative noises greatly reduce the precision. Here,…
Multi-parameter Quantum Magnetometry with Spin States in coarsened measurement reference
Dong Xie, Chunling Xu
We investigate the simultaneous estimation of the intensity and the orientation of a magnetic field by the multi-parameter quantum Fisher information matrix. A general expression i…
Enhancing precision of damping rate by PT symmetric Hamiltonian
Dong Xie, Chunling Xu
We utilize quantum Fisher information to investigate the damping parameter precision of a dissipative qubit. PT symmetric non-Hermitian Hamiltonian is used to enhance the parameter…