使用不受信任的设备验证通道的量子性
Verifying the quantumness of a channel with an untrusted device
摘要：
假设有人想证明一个量子信道不是纠缠破坏的。我考虑了通道输入和输出处的可信和不可信设备的所有四种组合，发现最有趣的是输入处的可信准备设备和输出处的不可信测量设备。这提供了一个类似于EPR转向的时间模拟，结果减少了联合可测量性的问题，以不同的方式将这些概念与其他最近的工作联系起来。我建议一些应用这种联系，如资源理论的不兼容性。这一观点也揭示了为什么BB84密钥分发协议即使使用不可信的测量设备也可以是安全的，从而导致任意对集合的不确定性关系。
英文摘要：
Suppose one wants to certify that a quantum channel is not entanglement-breaking. I consider all four combinations of trusted and untrusted devices at the input and output of the channel, finding that the most interesting is a trusted preparation device at the input and an untrusted measurement device at the output. This provides a time-like analogue of EPR-steering, which turns out to reduce to the problem of joint measurability, connecting these concepts in a different way to other recent work. I suggest a few applications of this connection, such as a resource theory of incompatibility. This perspective also sheds light on why the BB84 key distribution protocol can be secure even with an untrusted measuring device, leading to an uncertainty relation for arbitrary pairs of ensembles.
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。
