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arXiv 1706.01700quant-phcond-mat.quant-gas
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多模系统中的量子干涉

Quantum interferometry in multi-mode systems

J. Chwedenczuk

摘要:

我们考虑的情况下,通过每个臂的干涉仪传播的信号具有复杂的多模结构。我们发现了粒子纠缠与相位估计超过散粒噪声极限的可能性之间的关系。我们的结果是一般的-他们适用于纯态和混合态的相同和可区分的粒子(或两者的组合),为一个固定的和波动的粒子数。我们还指出,通常用于检测纠缠的方法在双模系统中可以给出误导的结果时,应用到多模的情况下。

英文摘要:

We consider the situation when the signal propagating through each arm of an interferometer has a complicated multi-mode structure. We find the relation between the particle-entanglement and the possibility to surpass the shot-noise limit of the phase estimation. Our results are general---they apply to pure and mixed states of identical and distinguishable particles (or combinations of both), for a fixed and fluctuating number of particles. We also show that the method for detecting the entanglement often used in two-mode system can give misleading results when applied to the multi-mode case.

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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