Results 71 to 80 of about 12,176,929 (371)
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 superconducting circuits: a review [PDF]
Reports on progress in physics. Physical Society, 2016 During the last ten years, superconducting circuits have passed from being interesting physical devices to becoming contenders for near-future useful and scalable quantum information processing (QIP).
G. Wendin
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Quantum information scrambling after a quantum quench [PDF]
Physical review B, 2019 How quantum information is scrambled in the global degrees of freedom of non-equilibrium many-body systems is a key question to understand local thermalization.
V. Alba, P. Calabrese
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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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Deterministic Entanglement Swapping with Hybrid Discrete- and Continuous-Variable Systems
Photonics, 2022 The study of entanglement between discrete and continuous variables is an important theoretical and experimental topic in quantum information processing, for which entanglement swapping is one of the interesting elements. Entanglement swapping allows two
Shou-Bang Yang +4 more
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Hybrid quantum information processing [PDF]
, 2014 The development of quantum information processing has traditionally followed two separate and not immediately connected lines of study. The main line has focused on the implementation of quantum bit (qubit) based protocols whereas the other line has been
Andersen, Ulrik L. +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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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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Total correlations and mutual information [PDF]
Physics Letters A 373 (2009) 1818-1822, 2008 In quantum information theory it is generally accepted that quantum mutual information is an information-theoretic measure of total correlations of a bipartite quantum state. We argue that there exist quantum states for which quantum mutual information cannot be considered as a measure of total correlations.
arxiv +1 more source
Thermodynamics of Quantum Information Flows. [PDF]
Physical Review Letters, 2019 We report two results complementing the second law of thermodynamics for Markovian open quantum systems coupled to multiple reservoirs with different temperatures and chemical potentials. First, we derive a nonequilibrium free energy inequality providing
Krzysztof Ptaszyński, M. Esposito
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