Results 81 to 90 of about 80,457 (267)
Decoherence models for discrete-time quantum walks and their application to neutral atom experiments
New Journal of Physics, 2014 We discuss decoherence in discrete-time quantum walks in terms of a phenomenological model that distinguishes spin and spatial decoherence. We identify the dominating mechanisms that affect quantum-walk experiments realized with neutral atoms walking in ...
Andrea Alberti +3 more
doaj +1 more source
Quantum Chaos and Quantum Randomness—Paradigms of Entropy Production on the Smallest Scales
Entropy, 2019 Quantum chaos is presented as a paradigm of information processing by dynamical systems at the bottom of the range of phase-space scales. Starting with a brief review of classical chaos as entropy flow from micro- to macro-scales, I argue that quantum ...
Thomas Dittrich
doaj +1 more source
Discerning the Nature of Neutrinos: Decoherence and Geometric Phases
Universe, 2020 We present new approaches to distinguish between Dirac and Majorana neutrinos. The first is based on the analysis of the geometric phases associated to neutrinos in matter, the second on the effects of decoherence on neutrino oscillations.
Antonio Capolupo +3 more
doaj +1 more source
On Tracial Operator Representations of Quantum Decoherence Functionals
, 1997 A general `quantum history theory' can be characterised by the space of histories and by the space of decoherence functionals. In this note we consider the situation where the space of histories is given by the lattice of projection operators on an ...
Rudolph, Oliver, Wright, J. D. Maitland
core +1 more source
Decoherence-free algebra [PDF]
Physics Letters A, 2003 We consider the decoherence free subalgebra which satisfies the minimal condition introduced by Alicki. We show the manifest form of it and relate the subalgebra with the Kraus representation. The arguments also provides a new proof for generalized L ders theorem.
openaire +2 more sources
Dynamics of decoherence: Universal scaling of the decoherence factor [PDF]
Physical Review A, 2016 We study the time dependence of the decoherence factor (DF) of a qubit globally coupled to an environmental spin system (ESS) which is driven across the quantum critical point (QCP) by varying a parameter of its Hamiltonian in time $t$ as $1 -t/ $ or $-t/ $, to which the qubit is coupled starting at the time $t \to -\infty$; here, $ $ denotes the ...
Suzuki, Sei, Nag, Tanay, Dutta, Amit
openaire +2 more sources
Advanced Photonics Research, EarlyView.This review highlights recent advances in accelerating luminescence in nanostructures through cooperative emission, resonator coupling, and nonlocal light–matter interactions. By unifying concepts such as excitonic superradiance, superfluorescence, and the plasmonic Purcell effect, it reveals physical limits of ultrafast emission and their potential ...
Masaaki Ashida +3 more
wiley +1 more source
Bound on the distance between controlled quantum state and target state under decoherence
Journal of Physics CommunicationsTo implement quantum information technologies, carefully designed control for preparing a desired state plays a key role. However, in realistic situation, the actual performance of those methodologies is severely limited by decoherence.
Kohei Kobayashi
doaj +1 more source
Decoherence of matter waves by thermal emission of radiation
, 2004 Emergent quantum technologies have led to increasing interest in decoherence - the processes that limit the appearance of quantum effects and turn them into classical phenomena.
Anton Zeilinger +33 more
core +1 more source
Decoherence and Multipartite Entanglement [PDF]
Physical Review Letters, 2004 4 pages, 2 figures, accepted for publication in Phys.
Carvalho, André R. R. +2 more
openaire +5 more sources