Results 21 to 30 of about 1,751,815 (231)

Experimental unsupervised learning of non-Hermitian knotted phases with solid-state spins

open access: yesnpj Quantum Information, 2022
Non-Hermiticity has widespread applications in quantum physics. It brings about distinct topological phases without Hermitian counterparts, and gives rise to the fundamental challenge of phase classification. Here, we report an experimental demonstration
Yefei Yu   +7 more
doaj   +1 more source

Experimental demonstration of coherence flow in PT- and anti-PT-symmetric systems

open access: yesCommunications Physics, 2021
The gain and loss inherent in non-Hermitian quantum systems can modify the flow of coherence between subsystems, which may be lost or recovered from the environment.
Yu-Liang Fang   +7 more
doaj   +1 more source

Infrared Quantum Information [PDF]

open access: yesPhysical Review Letters, 2017
We discuss information-theoretic properties of low-energy photons and gravitons in the S-matrix. Given an incoming n-particle momentum eigenstate, we demonstrate that unobserved soft photons decohere nearly all outgoing momentum superpositions of charged particles, while the universality of gravity implies that soft gravitons decohere nearly all ...
Dominik Neuenfeld   +3 more
openaire   +4 more sources

Coherent memory for microwave photons based on long-lived mechanical excitations

open access: yesnpj Quantum Information, 2023
Mechanical resonators, due to their capability to host ultralong-lived phonon modes, are particularly attractive for quantum state storage and as memory elements in conjunction with quantum computing and communication networks.
Yulong Liu   +5 more
doaj   +1 more source

What is quantum information? [PDF]

open access: yesStudies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics, 2016
Abstract In the present article we address the question 'What is quantum information?' from a conceptual viewpoint. In particular, we argue that there seems to be no sufficiently good reasons to accept that quantum information is qualitatively different from classical information.
Lombardi, Olimpia   +2 more
openaire   +5 more sources

Poisson Quantum Information [PDF]

open access: yesQuantum, 2021
By taking a Poisson limit for a sequence of rare quantum objects, I derive simple formulas for the Uhlmann fidelity, the quantum Chernoff quantity, the relative entropy, and the Helstrom information. I also present analogous formulas in classical information theory for a Poisson model.
openaire   +5 more sources

Quantum Information

open access: yesActa Physica Polonica A, 2021
This review article is based on a lecture on quantum information given at the XLVI Extraordinary Congress of Polish Physicists, Warsaw, Poland, October 16-18, 2020, on the occasion of the centenary of the Polish Physical Society. 37 pages, 4 figures.
openaire   +2 more sources

Quantum Information and Entanglement [PDF]

open access: yesAdvances in Mathematical Physics, 2010
1 School of Mathematical Sciences, Capital Normal University, Beijing 100048, China 2 Institute of Applied Mathematics, University of Bonn, 53115 Bonn, Germany 3 Departamento de Fisica Aplicada II, Universidad de Sevilla, 41012 Sevilla, Spain 4 Department of Mathematics, North Carolina State University, Raleigh, NC 27695, USA 5 Statistics and ...
Fei, Shao-Ming   +4 more
openaire   +3 more sources

Software engineering for 'quantum advantage' [PDF]

open access: yes, 2020
Software is a critical factor in the reliability of computer systems. While the development of hardware is assisted by mature science and engineering disciplines, software science is still in its infancy.
Abramsky S.   +3 more
core   +1 more source

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