论文标题

与相同颗粒的量子反事实

Quantum counterfactuality with identical particles

论文作者

Rao, Vinod N., Banerjee, Anindita, Srikanth, R.

论文摘要

量子自我干扰可以实现相反的信息传输,从而传递的位涉及不穿过通道的颗粒。在这项工作中,我们展示了即使在相同粒子之间的干扰代替自我干扰时,如何实现反事实。有趣的是,此处所述的不可区分性的方面与一阶连贯性有关,并且与与(反)换向操作员的(反)换向关系相关的常见概念不同。从实验的角度来看,可以通过对现有方案进行差异相移量子键分布或无相互作用测量的现有协议的轻微修改来实现提出的想法的最简单实现。

Quantum self-interference enables the counterfactual transmission of information, whereby the transmitted bits involve no particles traveling through the channel. In this work, we show how counterfactuality can be realized even when the self interference is replaced by interference between identical particles. Interestingly, the facet of indistinguishability called forth here is associated with first-order coherence, and is different from the usual notion of indistinguishability associated with the (anti-)commutation relations of mode operators. From an experimental perspective, the simplest implementation of the proposed idea can be realized by slight modifications to existing protocols for differential-phase-shift quantum key distribution or interaction-free measurement.

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