3 papers
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…
quant-ph2026
Machine learning-aided direct estimation of coherence and entanglement for unknown states
Ting Lin, Zhihua Chen, Kai Wu +3
Quantum coherence and entanglement are fundamental resources in quantum technologies, yet their efficient estimation for unknown states by employing minimal resources in experiment…
quant-ph2025
A coherence monotone from Kirkwood-Dirac nonclassicality with respect to mutually unbiased bases
Yan Liu, Zhihua Guo, Zhihao Ma +1
The Kirkwood-Dirac distribution, serving as an informationally complete representation of a quantum state, has recently garnered increasing attention. We investigate the Kirkwood-D…