Results 101 to 110 of about 3,277,735 (341)

How exchange symmetry impacts performance of collective quantum heat engines

open access: yesNew Journal of Physics
Recently, multilevel collectively coupled quantum machines like heat engines and refrigerators have been shown to admit performance enhancements in analogy to superradiance.
Julia Boeyens   +2 more
doaj   +1 more source

Noise resilience of variational quantum compiling

open access: yesNew Journal of Physics, 2020
Variational hybrid quantum-classical algorithms (VHQCAs) are near-term algorithms that leverage classical optimization to minimize a cost function, which is efficiently evaluated on a quantum computer.
Kunal Sharma   +3 more
doaj   +1 more source

Experimental investigation of classical and quantum correlations under decoherence

open access: yes, 2010
It is well known that many operations in quantum information processing depend largely on a special kind of quantum correlation, that is, entanglement.
A Aiello   +38 more
core   +1 more source

Quantum Blobs [PDF]

open access: yesFoundations of Physics, 2012
Quantum blobs are the smallest phase space units of phase space compatible with the uncertainty principle of quantum mechanics and having the symplectic group as group of symmetries. Quantum blobs are in a bijective correspondence with the squeezed coherent states from standard quantum mechanics, of which they are a phase space picture.
openaire   +4 more sources

Quantum computers and quantum coherence [PDF]

open access: yesJournal of Magnetism and Magnetic Materials, 1999
13 pages, latex, one eps figure. Prepared for special issue of J. Mag. Magn. Matl., "Magnetism beyond 2000".
DiVincenzo, D. P., Loss, D.
openaire   +2 more sources

Ab Initio Study on 3D Anisotropic Ferroelectric Switching Mechanism and Coercive Field in HfO2 and ZrO2

open access: yesAdvanced Functional Materials, EarlyView.
This study uncovers a new switching mechanism in HfO2 and ZrO2, where the absence of a non‐polar layer along the a‐direction induces interaction between polar layers. Consequently, the switching barriers for growth are lower than those for nucleation in this direction, leading to a size‐dependent coercive field that matches experimental observations ...
Kun Hee Ye   +6 more
wiley   +1 more source

Experimental quantum decoherence control by dark states of the environment

open access: yesNew Journal of Physics, 2020
Coherent interaction of a quantum system with environment usually induces quantum decoherence. However, remarkably, in certain configurations the coherent system–environment coupling can be simultaneously explored to engineer a specific dark state of the
Robert Stárek   +7 more
doaj   +1 more source

Quantum Emitters in Hexagonal Boron Nitride: Principles, Engineering and Applications

open access: yesAdvanced Functional Materials, EarlyView.
Quantum emitters in hexagonal boron nitride have emerged as a promising candidate for quantum information science. This review examines the fundamentals of these quantum emitters, including their level structures, defect engineering, and their possible chemical structures.
Thi Ngoc Anh Mai   +8 more
wiley   +1 more source

qCLUE: a quantum clustering algorithm for multi-dimensional datasets

open access: yesFrontiers in Quantum Science and Technology
Clustering algorithms are at the basis of several technological applications, and are fueling the development of rapidly evolving fields such as machine learning. In the recent past, however, it has become apparent that they face challenges stemming from
Dhruv Gopalakrishnan   +13 more
doaj   +1 more source

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