3 papers
quant-ph2026
Circulant quantum channels and its applications
Bing Xie, Lin Zhang
This note introduces a family of circulant quantum channels -- a subclass of the mixed-permutation channels -- and investigates its key structural and operational properties. We sh…
quant-ph2024
Bargmann-invariant framework for local unitary equivalence and entanglement
Lin Zhang, Bing Xie, Yuanhong Tao
Research on quantum states often focuses on the correlation between nonlocal effects and local unitary invariants, among which local unitary equivalence plays a significant role in…
quant-ph2024
Geometry of sets of Bargmann invariants
Lin Zhang, Bing Xie, Bo Li
Certain unitary-invariants, known as Bargmann invariants or multivariate traces of quantum states, have recently gained attention due to their applications in quantum information t…