Retrodictive fidelities for pure state postselectors
量子物理
2009-11-13 v3
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.
引用
@article{arxiv.quant-ph/0608113,
title = {Retrodictive fidelities for pure state postselectors},
author = {John Jeffers},
journal= {arXiv preprint arXiv:quant-ph/0608113},
year = {2009}
}
备注
8 Pages, 5 Figs. Accepted version, typos corrected