论文标题
更高维度纠缠的自适应状态保真度估计
Adaptive State Fidelity Estimation for Higher Dimensional Bipartite Entanglement
论文作者
论文摘要
建立了一种自适应方法，用于建立两分高维系统中的量子状态保真度估计。该方法采用了由本地POVM运算符构建的状态验证程序运算符，并在计算基础上适应了测量统计数据。采用这种方法，明确构建了稳定铃铛纠缠状态的状态验证器操作员。与计算基础上的错误操作员一起，可以在少数测量配置中估算贝尔型纠缠状态的状态保真度上的下限和上限。这些界限可能比[Bavaresco等人，自然物理学（2018），14，1032〜1037]中得出的保真度边界更紧密，如果一个人构造了一个以上的局部POVM测量值。
An adaptive method for quantum state fidelity estimation in bipartite higher dimensional systems is established. This method employs state verifier operators which are constructed by local POVM operators and adapted to the measurement statistics in the computational basis. Employing this method, the state verifier operators that stabilize Bell-type entangled states are constructed explicitly. Together with an error operator in the computational basis, one can estimate the lower and upper bounds on the state fidelity for Bell-type entangled states in few measurement configurations. These bounds can be tighter than the fidelity bounds derived in [Bavaresco et.al., Nature Physics (2018), 14, 1032~1037], if one constructs more than one local POVM measurements additional to the measurement in the computational basis.
