绝对隐蔽量子通信
Absolutely covert quantum communication
摘要：
在量子场论框架下，利用闵可夫斯基真空的量子力学性质，我们提出了隐蔽量子通信的真正极限。我们的主要结果如下：我们展示了配备Unruh-DeWitt探测器的两方如何在远距离进行隐蔽通信，而无需隐藏在热背景中或依赖各种技术技巧。我们恢复了渐近量子通信可靠性的信息论安全标准，并证明了隐蔽通信的速率是严格正的。因此，与以前的结论相反，隐蔽和可靠的量子通信是可能的。
英文摘要：
We present truly ultimate limits on covert quantum communication by exploiting quantum-mechanical properties of the Minkowski vacuum in the quantum field theory framework. Our main results are the following: We show how two parties equipped with Unruh-DeWitt detectors can covertly communicate at large distances without the need of hiding in a thermal background or relying on various technological tricks. We reinstate the information-theoretic security standards for reliability of asymptotic quantum communication and show that the rate of covert communication is strictly positive. Therefore, contrary to the previous conclusions, covert and reliable quantum communication is possible.
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