155 citations · 1.2k across the 47 of their papers we have counts for
4 papers · 2 filters
The negative probabilities and information gain in weak measurements
Xuanmin Zhu, Qun Wei, Quanhui Liu +1
We study the outcomes in a general measurement with postselection, and derive upper bounds for the pointer readings in weak measurement. Using the idea of weak measurement, we stud…
Unambiguous Examining the Orthogonality of Multiple Quantum States
Shengshi Pang, Shengjun Wu
In this article, we study an opposite problem of universal quantum state comparison, that is unambiguous determining whether multiple unknown quantum states from a Hilbert space ar…
Weak measurement with orthogonal pre-selection and post-selection
Shengshi Pang, Shengjun Wu, Zeng-Bing Chen
Weak measurement is a novel quantum measurement scheme, which is usually characterized by the weak value formalism. To guarantee the validity of the weak value formalism, the fidel…
Information gain versus coupling strength in quantum measurements
Xuanmin Zhu, Yuxiang Zhang, Quanhui Liu +1
We investigate the relationship between the information gain and the interaction strength between the quantum system and the measuring device. A strategy is proposed to calculate t…