Results 31 to 40 of about 6,416 (187)
Quantum State Tomography in Nonequilibrium Environments
Photonics, 2023 We generalize an approach to studying the quantum state tomography (QST) of open systems in terms of the dynamical map in Kraus representation within the framework of dynamic generation of informationally complete positive operator-valued measures.
Haonan Chen +6 more
doaj +1 more source
Early transverse decoherence of bunches with space charge
Physical Review Accelerators and Beams, 2016 The transverse decoherence of injected bunches is an important phenomenon in synchrotrons and storage rings. The initial stage of this process determines the transverse emittance blowup, which should be taken into account for the design of feedback ...
Ivan Karpov +2 more
doaj +1 more source
Non-Perfect Propagation of Information to a Noisy Environment with Self-Evolution
Entropy, 2022 We study the non-perfect propagation of information for evolving a low-dimensional environment that includes self-evolution as well as noisy initial states and analyse the interrelations between the degree of objectivization and environment parameters ...
Piotr Mironowicz +2 more
doaj +1 more source
Experimental quantum decoherence control by dark states of the environment
New 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
Entropy, 2017 This work investigates the influence of directional properties of decoherence on kinetics rate equations. The physical reality is understood as a chain of unitary and decoherence events.
A.Y. Klimenko
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Quantum Erasure of Decoherence [PDF]
Open Systems & Information Dynamics, 2007 We consider the classical algebra of observables that are diagonal in a given orthonormal basis, and define a complete decoherence process as a completely positive map that asymptotically converts any quantum observable into a diagonal one, while preserving the elements of the classical algebra.
Francesco Buscemi +2 more
openaire +5 more sources
Many-Body Localization and the Emergence of Quantum Darwinism
Entropy, 2021 Quantum Darwinism (QD) is the process responsible for the proliferation of redundant information in the environment of a quantum system that is being decohered.
Nicolás Mirkin, Diego A. Wisniacki
doaj +1 more source
Advanced Functional Materials, EarlyView.Here, we provide the reader with the current state of the art in the fabrication of high‐T2‐coherence diamond, optimized through the use of double electron–electron resonance (DEER) spectroscopy. We reveal the main as well as yet unidentified spin defects, the reduction of which is essential for reducing the spin bath and fabricating materials for ...
Olga Rubinas +6 more
wiley +1 more source
Self‐Cooling Molecular Spin Qudits
Advanced Materials, EarlyView.A material made of [GdEr] molecular dimers can encode a qudit and perform as a magnetic refrigerant. Microwave resonant pulses coherently manipulate its 16 spin states, while direct demagnetization measurements cool the material and a device down to temperatures below 1 K.
Elías Palacios +12 more
wiley +1 more source