Results 81 to 90 of about 4,583,269 (264)
Physical Review X, 2023 The expressive capacity of physical systems employed for learning is limited by the unavoidable presence of noise in their extracted outputs. Though present in physical systems across both the classical and quantum regimes, the precise impact of noise on
Fangjun Hu +8 more
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Information capacity of a quantum observable [PDF]
Problems of Information Transmission, 2012 13 pages.
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When does noise increase the quantum capacity? [PDF]
Physical Review Letters, 2011 Superactivation is the property that two channels with zero quantum capacity can be used together to yield a positive capacity. Here we demonstrate that this effect exists for a wide class of inequivalent channels, none of which can simulate each other ...
F. Brandão +2 more
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Quantum Communication With Zero-Capacity Channels [PDF]
Science 321, 1812 - 1815 (2008), 2008 Communication over a noisy quantum channel introduces errors in the transmission that must be corrected. A fundamental bound on quantum error correction is the quantum capacity, which quantifies the amount of quantum data that can be protected. We show theoretically that two quantum channels, each with a transmission capacity of zero, can have a ...
arxiv +1 more source
Hybrid Quantum Noise Model to Compute Gaussian Quantum Channel Capacity
IEEE AccessQuantum information processing leverages the principles of quantum mechanics, utilizing qubits, to improve computational and communicative tasks. In this realm, the quantum channel’s capacity is pivotal in determining the efficiency and accuracy ...
Mouli Chakraborty +3 more
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Capacity estimation and verification of quantum channels with arbitrarily correlated errors
Nature Communications, 2018 Estimating the quantum capacity allows one to assess the performance of quantum memories, communication channels, repeaters as well as error correction schemes.
Corsin Pfister +4 more
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Capacity of Quantum Private Information Retrieval with Colluding Servers [PDF]
International Symposium on Information Theory, 2020 Quantum private information retrieval (QPIR) is a protocol that a user retrieves one of f files from non-communicating n servers by downloading quantum systems without revealing the identity of the target file.
Seunghoan Song, Masahito Hayashi
semanticscholar +1 more source
Classical capacity of the generalized Pauli channels [PDF]
, 2019 We calculate and analyze the bounds of the Holevo capacity and classical capacity for the generalized Pauli channels. In particular, we obtain the lower and upper bounds of the Holevo capacity and show that if these bounds coincide, the Holevo capacity is weakly additive.
arxiv +1 more source
Bounds on the capacity and power of quantum batteries [PDF]
Physical Review Research, 2020 Quantum batteries, composed of quantum cells, are expected to outperform their classical analogs. The origin of such advantages lies in the role of quantum correlations, which may arise during the charging and discharging processes performed on the battery.
Maciej Lewenstein +8 more
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On Entangled Information and Quantum Capacity [PDF]
Open Systems & Information Dynamics, 2001 The pure quantum entanglement is generalized to the case of mixed compound states to include the classical and quantum encodings as particular cases. The true quantum entanglements are characterized as transpose-CP but not CP maps. The entangled information is introduced as the relative entropy of the mutual and the input state and total information ...
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