title: Ultra-sensitive and super-resolving angular rotation measurement based on photon orbital angular momentum using parity measurement.
abstract: Photon orbital angular momentum has led to many novel insights and applications in quantum measurement. Photon orbital angular momentum can increase the resolution and sensitivity of angular rotation measurement. However, quantum measurement strategy can further surpass this limit and improve the resolution of angular rotation measurement. This Letter proposes and demonstrates a parity measurement method in angular rotation measurement scheme for the first time. Parity measurement can make the resolution superior to the limit of the existing method. The sensitivity can be improved with higher orbital angular momentum photons. Moreover, this Letter gives a detailed discussion of the change of resolution and sensitivity in the presence of photon loss.
authors: Zijing
authors: Z
authors: Zhang
authors: Tianyuan
authors: T
authors: Qiao
authors: Kun
authors: K
authors: Ma
authors: Longzhu
authors: L
authors: Cen
authors: Jiandong
authors: J
authors: Zhang
authors: Feng
authors: F
authors: Wang
authors: Yuan
authors: Y
authors: Zhao