论文标题
麦克斯韦恶魔的有条件动作和量子版本
Conditional action and quantum versions of Maxwell's demon
论文作者
论文摘要
我们提出了一种在有条件行动方面查看量子麦克斯韦的恶魔问题的新方法。根据先前的测量结果选择的“条件作用”是一个单一的时间演变，可以减少系统的熵。但是，任何有条件的作用都可以通过较大系统的（无条件）单一时间演变和随后的Lüders测量来实现，从而增加了整个系统的熵要么增加或保持恒定。我们举了一些例子来说明和确认我们的建议，包括删除$ n $ Qubits和Szilard引擎，从而将当前的方法与Szilard原则和Landauer原则联系起来，这些原则已被讨论为Maxwell Demon问题的解决方案。
We propose a new way of looking at the quantum Maxwell's demon problem in terms of conditional action. A "conditional action" on a system is a unitary time evolution, selected according to the result of a previous measurement, which can reduce the entropy of the system. However, any conditional action can be realized by an (unconditional) unitary time evolution of a larger system and a subsequent Lüders measurement, whereby the entropy of the entire system is either increased or remains constant. We give some examples that illustrate and confirm our proposal, including the erasure of $N$ qubits and the Szilard engine, thus relating the present approach to the Szilard principle and the Landauer principle that have been discussed as possible solutions of the Maxwell's demon problem.
