Quantum Uncertainty Principles for Measurements with Interventions

Xiao, Yunlong; Yang, Yuxiang; Wang, Ximing; Liu, Qing; Gu, Mile

doi:10.1103/physrevlett.130.240201

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2024

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“…The link product theory of quantum channels [13] is an important tool for studying quantum networks. [13][14][15][16][17][18] Link product is the operation that connects two quantum networks. In this paper, we establish the Stinespring dilation theorem of link product of quantum channels in two different ways.…”

Section: Introductionmentioning

confidence: 99%

Dilation, discrimination and Uhlmann’s theorem of link products of quantum channels

Lei 雷,

Cao 操,

Kumar

et al. 2024

Chinese Phys. B

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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.

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