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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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The Structure and Quantum Capacity of a Partially Degradable Quantum Channel [PDF]
IEEE Access, 2014 The quantum capacity of degradable quantum channels has been proven to be additive. On the other hand, there is no general rule for the behavior of quantum capacity for antidegradable quantum channels.
Laszlo Gyongyosi
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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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Coherifying quantum channels [PDF]
New Journal of Physics, 2018 Is it always possible to explain random stochastic transitions between states of a finite-dimensional system as arising from the deterministic quantum evolution of the system?
Czachórski, Stanisław +3 more
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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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Bounds on classical information capacities for a class of quantum memory channels [PDF]
Phys. Rev. A 71, 034310 (2005), 2004 The maximum rates for information transmission through noisy quantum channels has primarily been developed for memoryless channels, where the noise on each transmitted state is treated as independent.
Bowen, Garry +2 more
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Partially Coherent Direct Sum Channels [PDF]
Quantum, 2021 We introduce $\textit{Partially Coherent Direct Sum}$ (PCDS) quantum channels, as a generalization of the already known $\textit{Direct Sum}$ quantum channels.
Stefano Chessa, Vittorio Giovannetti
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Quantifying the entanglement of quantum channel
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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Operational applications of the diamond norm and related measures in quantifying the non-physicality of quantum maps [PDF]
Quantum, 2021 Although quantum channels underlie the dynamics of quantum states, maps which are not physical channels — that is, not completely positive — can often be encountered in settings such as entanglement detection, non-Markovian quantum dynamics, or error ...
Bartosz Regula, Ryuji Takagi, Mile Gu
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Quantum capacity analysis of multi-level amplitude damping channels
Communications Physics, 2021 Estimating the capacity of quantum channels is relevant to understand at which rate quantum information can be exchanged. Here, the authors introduce multi-level amplitude damping channels that generalize the qubit amplitude damping noise model, analyse ...
Stefano Chessa, Vittorio Giovannetti
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