纯态后选择子的回溯性
Retrodictive fidelities for pure state postselectors
摘要:
两个措施的保真度提出后选择设备,追溯的条件概率,在测量臂的状态是一个由检测器所指示的,和设备产生的状态,它会产生,如果工作完美的概率。第一个是人们希望最大化以改善设备操作的自然量。第二个与设备的准确操作比更常见的基于网络的保真度更密切相关。所得结果特别适用于线性光学量子计算中的态制备和逻辑门操作类型。
英文摘要:
Two measures of fidelity are proposed for postselecting devices, the retrodictive conditional probability that the state in the measurement arm is the one indicated by the detectors, and the probability that the device produces the state that it would produce if working perfectly. The first is the natural quantity that one wishes to maximise to improve the device operation. The second corresponds more closely with the accurate operation of the device than the more usual overlap-based fidelity. The results are particularly applicable to the types of state preparation and logic gate operation in linear optical quantum computing.
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