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Operational resource theory of quantum channels [PDF]
Physical Review Research, 2020 Quantum resource theories have been widely studied to systematically characterize the nonclassicality of quantum systems. Most resource theories focus on quantum states and study their interconversions.
Yunchao Liu, Xiao Yuan
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Quasirandom quantum channels [PDF]
Quantum, 2020 Mixing (or quasirandom) properties of the natural transition matrix associated to a graph can be quantified by its distance to the complete graph. Different mixing properties correspond to different norms to measure this distance.
Tom Bannink +3 more
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Jordan products of quantum channels and their compatibility. [PDF]
Nat Commun, 2021 Given two quantum channels, we examine the task of determining whether they are compatible—meaning that one can perform both channels simultaneously but, in the future, choose exactly one channel whose output is desired (while forfeiting the output of ...
Girard M, Plávala M, Sikora J.
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Quantifying the entanglement of quantum channel [PDF]
Physical Review Research, 2022 To describe the nonclassicality of quantum channels, it is necessary to quantify their properties. In the framework of resource theory of quantum channel, we present three new entanglement measures of channels for a quantum system of arbitrary finite ...
Huaqi Zhou, Ting Gao, Fengli Yan
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A Fisher Information-Based Incompatibility Criterion for Quantum Channels [PDF]
Entropy, 2022 We introduce a new incompatibility criterion for quantum channels based on the notion of (quantum) Fisher information. Our construction is based on a similar criterion for quantum measurements put forward by H. Zhu.
Qing-Hua Zhang, Ion Nechita
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Detecting positive quantum capacities of quantum channels [PDF]
npj Quantum Information, 2022 Determining whether a noisy quantum channel can be used to reliably transmit quantum information is a challenging problem in quantum information theory. This is because it requires computation of the channel’s coherent information for an unbounded number
Satvik Singh, Nilanjana Datta
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On contraction coefficients, partial orders and approximation of capacities for quantum channels [PDF]
Quantum, 2022 The data processing inequality is the most basic requirement for any meaningful measure of information. It essentially states that distinguishability measures between states decrease if we apply a quantum channel and is the centerpiece of many results in
Christoph Hirche +2 more
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Necessary and sufficient conditions on measurements of quantum channels. [PDF]
Proc Math Phys Eng Sci, 2020 Quantum supermaps are a higher-order genera- lization of quantum maps, taking quantum maps to quantum maps. It is known that any completely positive and trace non-increasing (CPTNI) map can be performed as part of a quantum measurement.
Burniston J +4 more
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Programmability of covariant quantum channels [PDF]
Quantum, 2021 A programmable quantum processor uses the states of a program register to specify one element of a set of quantum channels which is applied to an input register. It is well-known that such a device is impossible with a finite-dimensional program register
Martina Gschwendtner +2 more
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Communication through coherent control of quantum channels [PDF]
Quantum, 2020 A completely depolarising quantum channel always outputs a fully mixed state and thus cannot transmit any information. In a recent Letter\cite{ebler18}, it was however shown that if a quantum state passes through two such channels in a quantum ...
Alastair A. Abbott +4 more
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