Results 81 to 90 of about 326,486 (291)

Strongly coupled cold atoms in bilayer dense lattices

New Journal of Physics, 2018
We theoretically investigate the optical response of many cold atoms within a pair of identical planar lattices mostly in a dense regime using microscopic electrodynamics numerical simulations.
Sung-Mi Yoo
doaj   +1 more source

Stark-tuned F\"orster resonance and dipole blockade for two to five cold Rydberg atoms: Monte Carlo simulations for various spatial configurations

, 2010
Results of numerical Monte Carlo simulations for the Stark-tuned F\"orster resonance and dipole blockade between two to five cold rubidium Rydberg atoms in various spatial configurations are presented.
Beterov, I. I., Entin, V. M., Ryabtsev, I. I., Tretyakov, D. B., Yakshina, E. A.   +4 more
core   +1 more source

Thermodynamic Pathways of Nonequilibrium Solidification in Wire‐Arc Additive Manufacturing Fe‐Based Multicomponent Alloy Structures

Advanced Engineering Materials, EarlyView.
Geometry‐driven thermal behavior in wire‐arc additive manufacturing (WAAM) influences microstructural evolution during nonequilibrium solidification of a chemically complex Fe–Cr–Nb–W–Mo–C nanocomposite system. By comparing different deposits configurations, distinct entropy–cooling rate correlations, segregation, and carbide evolution are revealed ...
Blanca Palacios, Anthony Gonzalez, Aleksander Aleman, Tyler Dolmetsch, Tanaji Paul, Arvind Agarwal   +5 more
wiley   +1 more source

A high resolution ion microscope for cold atoms

New Journal of Physics, 2017
We report on an ion-optical system that serves as a microscope for ultracold ground state and Rydberg atoms. The system is designed to achieve a magnification of up to 1000 and a spatial resolution in the 100 nm range, thereby surpassing many standard ...
Markus Stecker, Hannah Schefzyk, József Fortágh, Andreas Günther   +3 more
doaj   +1 more source

An Optomechanical Elevator: Transport of a Bloch Oscillating Bose–Einstein Condensate up and down an Optical Lattice by Cavity Sideband Amplification and Cooling

Atoms, 2015
In this paper we give a new description, in terms of optomechanics, of previous work on the problem of an atomic Bose–Einstein condensate interacting with the optical lattice inside a laser-pumped optical cavity and subject to a bias force, such as ...
B. Prasanna Venkatesh, Duncan H.J. O’Dell, Jonathan Goldwin   +2 more
doaj   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Cold atoms in videotape micro-traps

, 2005
We describe an array of microscopic atom traps formed by a pattern of magnetisation on a piece of videotape. We describe the way in which cold atoms are loaded into one of these micro-traps and how the trapped atom cloud is used to explore the properties
B. E. Sauer, B. V. Hall, Barb, Bertram, C. D.J. Sinclair, Calarco, E. A. Curtis, E. A. Hinds, Eriksson, Eriksson, Folman, Fortagh, Hinds, Hopkins, Hughes, Hughes, I. Llorente Garcia, J. A. Retter, Knappe, Lau, Lev, Lu, Reichel, Reichel, Roach, Rosenbusch, Rosenbusch, S. Eriksson, Saba, Schwindt, Treutlein   +30 more
core   +1 more source

Production of Cold Positronium Atoms

Acta Physica Polonica A, 2008
. In order to study antimatter physical properties (CPT(charge, parity, time) invariance and principle of equivalence test) it is nec-essary to keep this system at the lowest possible (sub-kelvin) temperatures.This requires the generation of a suitable °ux of cold Ps atoms in a vacuum,a non-trivial requirement at the light of the present experimental ...
R. S. Brusa, CONSOLATI, GIOVANNI, DUPASQUIER, ALFREDO, M. G. Giammarchi, S. Mariazzi, QUASSO, FIORENZA   +5 more
openaire   +4 more sources

Four‐Point Bending Tests at High Temperatures on Commercial MgO‐C Refractory Bricks with and Without Recyclate Considering Different Carbon Contents

Advanced Engineering Materials, EarlyView.
Four‐point bending tests are conducted in an argon atmosphere on commercial MgO‐C brick grades with and without MgO‐C recyclate from room temperature up to 1300 °C. No detrimental effect of the MgO‐C recyclates on bending strength is found. Instead, a decisive influence of the total carbon content is observed, with lower total carbon contents ...
Alexander Schramm, Lukas Knöchel, Thomas Schemmel, Christos G. Aneziris, Anja Weidner, Horst Biermann   +5 more
wiley   +1 more source

Three-dimensional Doppler, polarization-gradient, and magneto-optical forces for atoms and molecules with dark states

New Journal of Physics, 2016
We theoretically investigate the damping and trapping forces in a three-dimensional magneto-optical trap (MOT), by numerically solving the optical Bloch equations. We focus on the case where there are dark states because the atom is driven on a ‘type-II’
J A Devlin, M R Tarbutt
doaj   +1 more source