时间反演的EPR与量子力学中历史的选择
Time-Reversed EPR and the Choice of Histories in Quantum Mechanics
摘要:
当单个光子被分束器分裂时,它的两个“半”可以将两个遥远的原子纠缠成EPR对。我们讨论了这个实验的时间反演模拟,其中两个遥远的源合作,以发射一个光子。这两个“半光子”与两个原子相互作用,一旦它们被检测为单个光子,就可以将这些原子纠缠成EPR对。纠缠是通过在光子的两个相互排斥的历史之间产生不可逆性而发生的。这种不可逆性可以在两个历史的末尾(通过“擦除”单个光子的路径)或在它们的开始(通过“擦除”两个原子的位置)创建。
英文摘要:
When a single photon is split by a beam splitter, its two `halves' can entangle two distant atoms into an EPR pair. We discuss a time-reversed analogue of this experiment where two distant sources cooperate so as to emit a single photon. The two `half photons,' having interacted with two atoms, can entangle these atoms into an EPR pair once they are detected as a single photon. Entanglement occurs by creating indistinguishabilility between the two mutually exclusive histories of the photon. This indistinguishabilility can be created either at the end of the two histories (by `erasing' the single photon's path) or at their beginning (by `erasing' the two atoms' positions).
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