Results 31 to 40 of about 4,021,386 (329)

Quantum chaos in quantum wells [PDF]

open access: yesPhysica D: Nonlinear Phenomena, 1999
25 pages, 15 figures, accepted for publication in Physica ...
Narimanov, E. E., Stone, A. Douglas
openaire   +3 more sources

QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials [PDF]

open access: yesJournal of Physics: Condensed Matter, 2009
QUANTUM ESPRESSO is an integrated suite of computer codes for electronic-structure calculations and materials modeling, based on density-functional theory, plane waves, and pseudopotentials (norm-conserving, ultrasoft, and projector-augmented wave).
P. Giannozzi   +32 more
semanticscholar   +1 more source

Evidence for the utility of quantum computing before fault tolerance

open access: yesNature, 2023
Quantum computing promises to offer substantial speed-ups over its classical counterpart for certain problems. However, the greatest impediment to realizing its full potential is noise that is inherent to these systems.
Youngseok Kim   +10 more
semanticscholar   +1 more source

Quantum Oscillations without Quantum Coherence [PDF]

open access: yesPhysical Review Letters, 2003
We study numerically the damping of quantum oscillations and the increase of entropy with time in model spin systems decohered by a spin bath. In some experimentally relevant cases, the oscillations of considerable amplitude can persist long after the entropy has saturated near its maximum, i.e.
Dobrovitski, VV   +3 more
openaire   +3 more sources

Spectral Emission Dependence of Tin‐Vacancy Centers in Diamond from Thermal Processing and Chemical Functionalization

open access: yesAdvanced Photonics Research, 2022
A systematic photoluminescence (PL) investigation of the spectral emission properties of individual optical defects fabricated in diamond upon ion implantation and annealing is reported.
Emilio Corte   +11 more
doaj   +1 more source

Teaching and Learning Optics in High School: From Fermat to Feynman

open access: yesEducation Sciences, 2023
In this article, we analyze the basis of a proposal that allows teaching the notions of reflection, refraction, interference and diffraction from a unified perspective, using Fermat’s variational principle, recovered by Richard Feynman in his formulation
Maria Rita Otero, Marcelo Fabian Arlego
doaj   +1 more source

Quantum channels in quantum gravity [PDF]

open access: yesInternational Journal of Modern Physics D, 2014
The black hole final state proposal implements manifest unitarity in the process of black hole formation and evaporation in quantum gravity, by postulating a unique final state boundary condition at the singularity. We argue that this proposal can be embedded in the gauge/gravity context by invoking a path integral formalism inspired by the Schwinger ...
Rangamani, Mukund, Rota, Massimilliano
openaire   +4 more sources

Quantum-Sized Zinc Oxide Nanoparticles Synthesised within Mesoporous Silica (SBA-11) by Humid Thermal Decomposition of Zinc Acetate

open access: yesCrystals, 2020
A modified facile method is presented to synthesise quantum-sized zinc oxide nanoparticles within the pores of a mesoporous silica host (SBA-11). This method eliminates the 3 h alcohol reflux and the basic solution reaction steps of zinc acetate.
Tariq Aqeel, Heather F. Greer
doaj   +1 more source

Some q-Fractional Estimates of Trapezoid like Inequalities Involving Raina’s Function

open access: yesFractal and Fractional, 2022
In this paper, we derive two new identities involving q-Riemann-Liouville fractional integrals. Using these identities, as auxiliary results, we derive some new q-fractional estimates of trapezoidal-like inequalities, essentially using the class of ...
Kamsing Nonlaopon   +4 more
doaj   +1 more source

The Fundamental Nature of Motives

open access: yesFrontiers in Neuroscience, 2022
Decision-making is described as a natural process, one among others, consuming free energy in the least time. The thermodynamic tenet explains why data associated with decisions display the same patterns as any other data: skewed distributions, sigmoidal
Arto Annila
doaj   +1 more source

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