Results 21 to 30 of about 1,884,975 (297)

Thermal entanglement in two-atom Tavis–Cummings model with taking into account the dipole-dipole interaction

open access: yesФизика волновых процессов и радиотехнические системы, 2023
Background. Interest in the study of entangled states of systems of natural and artificial atoms (qubits) interacting with selected modes of microwave resonators is associated with their use as logic elements of quantum computers.
Eugene K. Bashkirov
doaj   +1 more source

Bose-Einstein correlations in thermal field theory [PDF]

open access: yes, 1995
Two-particle correlation functions are calculated for bosons emitted from a localized thermal source (the ``glow'' of a ``hot spot''). In contrast to existing work, non-equilibrium effects up to first order in gradients of the particle distribution ...
Blasone, M.   +3 more
core   +2 more sources

Validation of a Theoretical Model for Laser Welding Thermal Field by Multi-Physics Numerical Simulation

open access: yesMetals, 2023
Theoretical models based on solutions of the conduction heat transfer equation have been widely proposed to calculate the thermal fields generated during laser welding, revealing simplification benefits and limitations in the accuracy of the results.
Fabio Giudice, Andrea Sili
doaj   +1 more source

Enhancing far-field thermal emission with thermal extraction [PDF]

open access: yesCLEO: 2013, 2013
The control of thermal radiation is of great current importance for applications such as energy conversions and radiative cooling. Here we show theoretically that the thermal emission of a finite-size blackbody emitter can be enhanced in a thermal extraction scheme, where one places the emitter in optical contact with an extraction device consisting of
Zongfu, Yu   +5 more
openaire   +2 more sources

Thermal Properties of an Inflationary Universe [PDF]

open access: yes, 1996
An energetic justification of a thermal component during inflation is given. The thermal component can act as a heat reservoir which induces thermal fluctuations on the inflaton field system.
A. Berera   +40 more
core   +4 more sources

THERMAL FIELD DESORPTION

open access: yesLe Journal de Physique Colloques, 1989
Adiabatic potential energy curves have been calculated as a function of electric field strength for the ground state and an excited state of helium adsorbed on tungsten. Using a unitary transformation we construct the diabatic energy curves for neutral helium and its singly charged ion. We also obtained the coupling term between these states from which
Kreuser, H., Wang, L.
openaire   +2 more sources

Derivation of the Planck Spectrum for Relativistic Classical Scalar Radiation from Thermal Equilibrium in an Accelerating Frame [PDF]

open access: yes, 2010
The Planck spectrum of thermal scalar radiation is derived suggestively within classical physics by the use of an accelerating coordinate frame. The derivation has an analogue in Boltzmann's derivation of the Maxwell velocity distribution for thermal ...
B. F. Schutz   +10 more
core   +1 more source

SLM lattice thermal fields acquired by wide-field thermal camera

open access: yesProcedia CIRP, 2018
Abstract Selective laser melting (SLM) enables the fabrication of complex geometries, however the existing literature provides little experimental data on the effect of geometric complexity, such as lattice structures, on the in-situ temperature field.
Matthew McMillan   +3 more
openaire   +1 more source

Synoptic events associated with the land surface temperature in Rio de Janeiro

open access: yesBioscience Journal, 2017
This article aimed to evaluate land surface temperature using MOD11A2 (Terra satellite) with spatial resolution of one kilometre, compares its findings with land surface temperature data gathered by conventional meteorological stations, and, finally ...
Rafael Coll Delgado   +4 more
doaj   +3 more sources

PECULIARITIES OF CALCULATING STATIONARY HEATING OF WINDINGS OPERATING IN COMPLEX FORCED CONTROL SYSTEMS

open access: yesElectrical engineering & Electromechanics, 2019
General description of the research topic. A technique and an algorithm for calculating the thermal field of electromagnets operating in complex forced systems proposed by authors are considered.
E. I. Baida   +5 more
doaj   +1 more source

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