论文标题
评论“弱痕迹显示量子粒子的过去？”
Comment on "Does the weak trace show the past of a quantum particle?"
论文作者
论文摘要
在论文中：“弱痕迹是否显示出量子粒子的过去？” [Arxiv：2109.14060V2]，有人认为，空间投影仪的无弱值不足以在制备和检测之间的中间时间推断量子粒子的存在。该结论依赖于两个参数 - （i）弱测量引起的干扰的作用，以及（ii）经典特征，例如连续路径，据称必须与量子粒子的存在相关。在这里，我们首先证明（i）是由于对无效弱值的误解而引起的，提出一个简单的反示例，该例子强调了要检查的相关数量是消失的幅度，而不是波函数。然后，我们简要地认为，为了解释单一进化过程中的量子特性，执行经典的前提条件不太可能导致对量子现象的一致理解。
In the paper "Does the weak trace show the past of a quantum particle?" [arXiv:2109.14060v2], it is argued that null weak values of the spatial projectors are inadequate to infer the presence of a quantum particle at an intermediate time between preparation and detection. This conclusion relies on two arguments - (i) the role of the disturbance induced by a weak measurement, and (ii) classical-like features like continuous paths that must purportedly be associated with a quantum particle presence. Here we first show that (i) arises from a misunderstanding of null weak values by putting forward a simple counter-example that highlights that the relevant quantities to examine are the vanishing amplitudes, not the wavefunction. Then we briefly argue that enforcing classical pre-conditions in order to account for quantum properties during unitary evolution is unlikely to lead to a consistent understanding of quantum phenomena.
