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arXiv quant-ph/9610031quant-ph
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冷阱离子自发发射效应的修正

Correcting the effects of spontaneous emission on cold trapped ions

C. D'Helon, G. J. Milburn

摘要:

我们提出了两个量子纠错方案,增加了最大的存储时间的量子比特在一个系统的冷囚禁离子,使用最少数量的辅助量子比特。这两种方案都只考虑了由于离子上能级的自发发射引起的退相干所引入的误差。离子荧光的连续监测与选择性相干反馈结合使用,以消除紧接在自发发射事件之后的这些误差,并且通过使量子码字对称化来去除量子跳跃之间的条件时间演化。

英文摘要:

We propose two quantum error correction schemes which increase the maximum storage time for qubits in a system of cold trapped ions, using a minimal number of ancillary qubits. Both schemes consider only the errors introduced by the decoherence due to spontaneous emission from the upper levels of the ions. Continuous monitoring of the ion fluorescence is used in conjunction with selective coherent feedback to eliminate these errors immediately following spontaneous emission events, and the conditional time evolution between quantum jumps is removed by symmetrizing the quantum codewords.

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