Information-disturbance trade-off in quantum-state discrimination
Information-disturbance trade-off in quantum-state discrimination
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DOI:
10.1103/physreva.74.052320
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发表时间:
2006-10
影响因子:
2.9
通讯作者:
F. Buscemi;M. Sacchi
中科院分区:
文献类型:
--
作者:
F. Buscemi;M. Sacchi
(Dated: February 1, 2008)When discriminating between two pure quantum states, there exists a quantitative tradeoff be-tween the information retrieved by the measurement and the disturbance caused on the unknownstate. We derive the optimal tradeoff and provide the corresponding quantum measurement. Such anoptimal measurement smoothly interpolates between the two limiting cases of maximal informationextraction and no measurement at all.