首页|Parameter estimation in n-dimensional massless scalar field
Parameter estimation in n-dimensional massless scalar field
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
万方数据
维普
Quantum Fisher information(QFI)associated with local metrology has been used to parameter estimation in open quantum systems.In this work,we calculated the QFI for a moving Unruh-DeWitt detector coupled with massless scalar fields in n-dimensional spacetime,and analyzed the behavior of QFI with various parameters,such as the dimension of spacetime,evolution time,and Unruh temperature.We discovered that the QFI of state parameter decreases monotonically from 1 to 0 over time.Additionally,we noted that the QFI for small evolution times is several orders of magnitude higher than the QFI for long evolution times.We also found that the value of QFI decreases at first and then stabilizes as the Unruh temperature increases.It was observed that the QFI depends on initial state parameter θ,and Fθ is the maximum for θ=0 or θ=n,Fφ is the maximum for θ=π/2.We also obtain that the maximum value of QFI for state parameters varies for different spacetime dimensions with the same evolution time.
quantum Fisher informationparameter estimationopen quantum systems
杨颖、荆继良
展开 >
Hunan Provincial Key Laboratory of Intelligent Sensors and Advanced Sensor Materials,School of Physics and Electronics,Hunan University of Science and Technology,Xiangtan 411201,China
Department of Physics,Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education,and Synergetic Innovation Center for Quantum Effects and Applications,Hunan Normal University,Changsha 410081,China
国家自然科学基金国家自然科学基金Science Research Fund of the Education Department of Hunan Province,China
万方数据
维普
