6 papers
Thermal AdS two-point functions and loop induced effective one-point vertices
Astha Kakkar
We present a study of thermal two-point functions from Witten diagrams in thermal AdS, defined with the conformal boundary , with an aim to e…
Frame phase retrievability and state distinguishability of quantum channels
Deguang Han, Kai Liu
This survey introduces the role of frame phase retrieval in pure-state identification and information preservation by quantum channels. For unit vectors, the lift i…
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…
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…
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 $\{…
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…