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arXiv quant-ph/0510217quant-ph
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回溯量子光学态工程

Retrodictive quantum optical state engineering

K. L. Pregnell, D. T. Pegg

摘要:

虽然人们知道量子力学可以用一种平等对待预测和追溯的方式来表述,但工程量子态的大多数注意力都集中在预测态上,即与准备事件相关的状态。然而,与测量事件相关联并且在时间上向后传播的追溯状态也是有用的。在本文中,我们将展示如何任何retrodictive状态的光,可以写一个很好的近似作为一个有限的光子数态的叠加可以产生的光学多端口设备。通过控制预测相干输入态来调节状态的组成。我们展示了如何成功的状态生成的概率可以通过调整多端口设备进行优化,并检查一个通用的配置,这是有用的生成一系列的状态。

英文摘要:

Although it has been known for some time that quantum mechanics can be formulated in a way that treats prediction and retrodiction on an equal footing, most attention in engineering quantum states has been devoted to predictive states, that is, states associated with the a preparation event. Retrodictive states, which are associated with a measurement event and propagate backwards in time, are also useful, however. In this paper we show how any retrodictive state of light that can be written to a good approximation as a finite superposition of photon number states can be generated by an optical multiport device. The composition of the state is adjusted by controlling predictive coherent input states. We show how the probability of successful state generation can be optimised by adjusting the multiport device and also examine a versatile configuration that is useful for generating a range of states.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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