학술논문
玻色-爱因斯坦凝聚与光场作用的保真度 / Fidelity of quantum states in a system of atomic Bose-Einstein condensate interacting with light field
Document Type
Academic Journal
Source
量子电子学报 / Chinese Journal of Quantum Electronics. 41(1):95-102
Subject
Language
Chinese
ISSN
1007-5461
Abstract
利用量子信息论和数值计算方法,对Pólya场态与玻色-爱因斯坦凝聚原子相互作用系统的量子态保真度演化问题进行了研究.讨论了玻色-爱因斯坦凝聚原子间的相互作用强度、Pólya场态概率参数和分布参数,以及这些物理参数如何影响量子态保真度随时间的演化.研究结果表明:上述三种物理参量均可调制信号传输中的量子态保真度,其中光场概率参数η对量子态保真度的变化影响最大,当 η=0.01时,量子信息保真度的值非常接近信息理想传输的情形;另一方面,凝聚原子间的耦合强度越大,量子态保真度呈现出的周期性振荡也越强,但量子态保真度的取值范围不变.
The evolution properties of quantum information fidelity in a system of atomic Bose-Einstein condensate interacting with Pólya field state have been studied using quantum information theory and numerical calculation methods.The influences of the coupling intensity among the atoms of Bose-Einstein condensates,and the probability and distribution parameters of Pólya light field on the fidelity of quantum state are mainly focused.The results indicate that the fidelity of quantum information during the transmission depends on the coupling intensity among the atoms,as well as the optical field parameters.Among the three physical parameters,the probability parameter of the light field η have a crucial effect on the fidelity of quantum state.When η=0.01,the fidelity of quantum information is very close to that in ideal transmission process for information.On the other hand,the oscillating frequency of the system fidelity would have the larger values with the increasing of coupling intensity among the atoms of Bose-Einstein condensate,but the range of system fidelity values remains unchanged.
The evolution properties of quantum information fidelity in a system of atomic Bose-Einstein condensate interacting with Pólya field state have been studied using quantum information theory and numerical calculation methods.The influences of the coupling intensity among the atoms of Bose-Einstein condensates,and the probability and distribution parameters of Pólya light field on the fidelity of quantum state are mainly focused.The results indicate that the fidelity of quantum information during the transmission depends on the coupling intensity among the atoms,as well as the optical field parameters.Among the three physical parameters,the probability parameter of the light field η have a crucial effect on the fidelity of quantum state.When η=0.01,the fidelity of quantum information is very close to that in ideal transmission process for information.On the other hand,the oscillating frequency of the system fidelity would have the larger values with the increasing of coupling intensity among the atoms of Bose-Einstein condensate,but the range of system fidelity values remains unchanged.