论文标题
评论“ Bloch Waves是否互相干扰？”
Comment on "Do Bloch waves interfere with one another?"
论文作者
论文摘要
我们指出[物理学中提出的论点。 Lett。一个417，127699（2021）]，得出的结论是，在周期性系统中，有一个超选择原理禁止两个不同的bloch状态形成固定相的连贯叠加，这是不合理的，是错误的。例如，我们表明，可以在实验中使用投射到选定的Wannier状态的操作员来确定超封闭Bloch状态之间的相对相。通过这种方式，我们认为，实际上，在执行局部测量时，总是表现出上述超选择原理的不存在，例如，在限制在光学晶格中的超级原子的最新实验中。
We point out that argumentation presented in [Phys. Lett. A 417, 127699 (2021)], leading to the conclusion that in periodic systems there is a superselection principle forbidding two different Bloch states to form a coherent superposition of a fixed phase, is unjustified and false. As an example, we show that the operator projecting to the selected Wannier state can be experimentally utilized to determine relative phase between superposed Bloch states. In this way we argue that, in fact, the non-existence of the aforementioned superselection principle is manifested always when localized measurements are performed, for example in state-of-the-art experiments with ultracold atoms confined in optical lattices.
