论文标题
反事实量子通信中的非本地是什么？
What is nonlocal in counterfactual quantum communication?
论文作者
论文摘要
我们重新审视Salih等人的“反事实量子通信”。 [1]声称观察者“鲍勃”可以向第二个观察者“爱丽丝”发送一点点信息，而没有任何物理粒子之间的任何物理粒子。我们表明，本地保守的，无质量的电流 - 特别是模块化角动量的电流，$ l_z $ mod 2 $ \ hbar $ - 带有一点点信息。我们整合了$ L_Z $ MOD 2 $ \ HBAR $从Bob到Alice的通量，并表明它等于$ l_z $ mod 2 $ \ hbar $的两个特征值之一，0或$ \ hbar $，因此准确地考虑了他寄给她的一位信息。我们先前使用$ L_Z $ mod 2 $ \ hbar $的弱值[2]获得了此结果；在这里，我们不使用弱价值。
We revisit the "counterfactual quantum communication" of Salih et al. [1], who claim that an observer "Bob" can send one bit of information to a second observer "Alice" without any physical particle traveling between them. We show that a locally conserved, massless current - specifically, a current of modular angular momentum, $L_z$ mod 2$\hbar$ - carries the one bit of information. We integrate the flux of $L_z$ mod 2$\hbar$ from Bob to Alice and show that it equals one of the two eigenvalues of $L_z$ mod 2$\hbar$, either 0 or $\hbar$, thus precisely accounting for the one bit of information he sends her. We previously [2] obtained this result using weak values of $L_z$ mod 2$\hbar$; here we do not use weak values.
