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
期刊:
影响因子:
2.9
通讯作者:
F. Buscemi;M. Sacchi
F. Buscemi;M. Sacchi
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
F. Buscemi;M. Sacchi

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(日期:2008年2月1日)在区分两个纯量子态时,在测量得到的信息和对未知态造成的扰动之间存在定量的交易ff。我们推导出了最优的Tradeoff,并给出了相应的量子测量。这种最优测量在最大信息提取和根本没有测量的两种限制情况之间平滑地内插。
(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.