4 papers
quant-ph2026
Enhancing Phase Retrievability of Quantum Channels via Interferometric Coupling
Kai Liu, Deguang Han, Omar Nour
Phase retrievability of a quantum channel asks whether pure states can be reconstructed from suitable measurements. In this paper, we study this problem from three complementary vi…
quant-ph2024
Fidelity preserving and decoherence for mixed unitary quantum channels
Kai Liu, Deguang Han
Distinguishable and non-distinguishable quantum states are fundamental resources in quantum mechanics and quantum technologies. Interactions with the environment often induce decoh…
quant-ph2023
Phase retrievability of frames and quantum channels
Kai Liu, Deguang Han
A phase retrievable quantum channel refers to a quantum channel such that there is a positive operator valued measure (POVM) in and $\{…
quant-ph2023
Zero Error Correctibility and Phase Retrievability for Twirling Channels
Kai Liu, Deguang Han
A twirling channel is a quantum channel induced by a continuous unitary representation , where are inequivalent irreducible representations. Moti…