发明名称 |
Methods for determining relative phase differences in entangled quantum states |
摘要 |
Various embodiments of the present invention are directed to methods for determining a phase shift acquired by an entangled N-qubit system represented by a NOON state. In one embodiment, a probe electromagnetic field is coupled with each qubit system. The phase shift acquired by the qubit systems is transferred to the probe electromagnetic field by transforming each qubit-system state into a linear superposition of qubit basis states. An intensity measurement is performed on the probe electromagnetic field in order to obtain a corresponding measurement result. A counter associated with a measurement-result interval is incremented, based on the measurement result falling within the measurement-result interval. A frequency distribution is produced by normalizing the counter associated with each measurement-result interval for a number of trials. The phase shift is determined by fitting a probability distribution associated with the probe electromagnetic field to the frequency distribution as a function of the phase shift.
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申请公布号 |
US2007250280(A1) |
申请公布日期 |
2007.10.25 |
申请号 |
US20060407600 |
申请日期 |
2006.04.19 |
申请人 |
BEAUSOLEIL RAYMOND G;MUNRO WILLIAM J;SPILLER TIMOTHY P;KOK PIETER;BARRETT SEAN D;NEMOTO KAE |
发明人 |
BEAUSOLEIL RAYMOND G.;MUNRO WILLIAM J.;SPILLER TIMOTHY P.;KOK PIETER;BARRETT SEAN D.;NEMOTO KAE |
分类号 |
G06F19/00 |
主分类号 |
G06F19/00 |
代理机构 |
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代理人 |
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地址 |
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