Results 51 to 60 of about 1,084,527 (331)
Noiseless photonic non-reciprocity via optically-induced magnetization
Nature Communications, 2021 Optical nonreciprocity through magneto-optical effects requires bulky apparatuses and strong magnetic fields, while magnetic-free approaches are difficult to implement. Here, the authors use optically-induced magnetisation in an atomic ensemble to get 50
Xin-Xin Hu +11 more
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Information-theoretic interpretation of quantum error-correcting codes [PDF]
, 1997 Quantum error-correcting codes are analyzed from an information-theoretic perspective centered on quantum conditional and mutual entropies. This approach parallels the description of classical error correction in Shannon theory, while clarifying the ...
A. Ekert +24 more
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Single ion qubit with estimated coherence time exceeding one hour
Nature Communications, 2021 Extending qubit coherence times represent one of the key challenges for quantum technologies. Here, after properly suppressing magnetic-field fluctuations, frequency instability and leakage of the microwave reference-oscillator, the authors infer ...
Pengfei Wang +9 more
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Quantum Information Processing with Quantum Optics
Annales Henri Poincaré, 2003 We review theoretical proposals for implementation of quantum computing and quantum communication with quantum optical methods.
Cirac, J, Duan, L, Jaksch, D, Zoller, P
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Quantum Coherence, Coherent Information and Information Gain in Quantum Measurement
, 2019 A measurement is deemed successful, if one can maximize the information gain by the measurement apparatus. Here, we ask if quantum coherence of the system imposes a limitation on the information gain during quantum measurement.
Pati, Arun Kumar +2 more
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npj Quantum Information, 2023 Entanglement distribution is at the heart of most quantum communication protocols. Inevitable loss of photons along quantum channels is a major obstacle for distributing entangled photons over long distances, as the no-cloning theorem forbids the ...
Lukas Achatz +9 more
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One-way Unlocalizable Information Deficit
, 2013 We introduce one-way unlocalizable information deficit with respect to the one-way information deficit, similar to the definition of one-way unlocalizable quantum discord with respect to one-way quantum discord.
Fei, Shao-Ming, Zhu, Xue-Na
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Benchmarking universal quantum gates via channel spectrum
Nature Communications, 2023 Noise remains the major obstacle to scalable quantum computation. Quantum benchmarking provides key information on noise properties and is an important step for developing more advanced quantum processors. However, current benchmarking methods are either
Yanwu Gu +3 more
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Twin-field quantum key distribution without optical frequency dissemination
Nature Communications, 2023 Twin-field (TF) quantum key distribution (QKD) has rapidly risen as the most viable solution to long-distance secure fibre communication thanks to its fundamentally repeater-like rate-loss scaling.
Lai Zhou +3 more
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, 2012 Quantum information theory is the study of the achievable limits of information processing within quantum mechanics. Many different types of information can be accommodated within quantum mechanics, including classical information, coherent quantum information, and entanglement.
Michael A. Nielsen, Isaac L. Chuang
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