Dilation, Discrimination and Uhlmann's Theorem of Link Products of Quantum Channels

Autor:	Lei, Qiang, Cao, Liuheng, Kumar, Asutosh, Wu, Junde
Rok vydání:	2023
Předmět:	Quantum Physics
Zdroj:	Chin. Phys. B 33, 030304 (2024)
Druh dokumentu:	Working Paper
DOI:	10.1088/1674-1056/ad0ccb
Popis:	The study of quantum channels is the most fundamental theoretical problem in quantum information and quantum communication theory. The link product theory of quantum channels is an important tool for studying quantum networks. In this paper, we establish the Stinespring dilation theorem of the link product of quantum channels in two different ways, discuss the discrimination of quantum channels and show that the distinguishability can be improved by self-linking each quantum channel n times as n grows. We also find that the maximum value of Uhlmann's theorem can be achieved for diagonal channels. Comment: 11 pages
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2309.03052 Zobrazit plný text záznamu View this record from Arxiv