State tomography via weak measurements.
State tomography via weak measurements.
复制标题
通过弱测量进行状态断层扫描
DOI:
10.1038/srep01193
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发表时间:
2013
影响因子:
4.6
通讯作者:
Wu, Shengjun
中科院分区:
文献类型:
--
作者:
Wu, Shengjun
Recent work has revealed that the wave function of a pure state can be measured directly and that complementary knowledge of a quantum system can be obtained simultaneously by weak measurements. However, the original scheme applies only to pure states and it is not efficient because most of the data are discarded by post-selection. Here, we propose tomography schemes for pure states and for mixed states via weak measurements and our schemes are more efficient because we do not discard any data. Furthermore, we demonstrate that any matrix element of a general state can be directly read from an appropriate weak measurement. The density matrix (with all of its elements) represents all that is directly accessible from a general measurement.
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影响因子:
2.9
作者:
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通讯作者:
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