Nonlocal Measurement of Rotational Speed: Limitations of Superposition Probe States

Regarding the nonlocal measurement of an object's rotational speed, a recent proposal by A suggests a new method. However, it's crucial to note that both their theoretical framework and experimental setup rely on a specific constraint: the probe state must be a superposition of positive and negative L. This limitation may impact the generalizability and practicality of the proposed method.