3 papers
quant-ph2026
Twenty-one characterizations of reversible quantum channels
Nan Li, Yuan Li, Hanyu Yang +1
Reversible quantum channels play a fundamental role in quantum dynamics and quantum information processing. A quantum channel is reversible if there exists another quantum channel…
quant-ph2026
The Hilbert-Schmidt norms of quantum channels and matrix integrals over the unit sphere
Yuan Li, Zhengli Chen, Zhihua Guo +1
The dynamics of quantum systems are generally described by a family of quantum channels (linear, completely positive and trace preserving maps). In this note, we mainly study the r…
math.FA2025
Structure and positivity of linear maps preserving covariance under unitary evolution
Yuan Li, Shuaijie Wang, Xiaoming Xu
Let be a complex finite-dimensional or infinite-dimensional separable Hilbert space, and be the Banach spaces of all bounded linear…