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Photoluminescence (PL) is a light-matter quantum interaction associated with the chemical potential of light formulated by the Generalized Planck's law. Without knowing the inherent temperature dependence of chemical potential, the…

Atomic Physics · Physics 2021-01-19 Matej Kurtulik , Rafi Weill , Assaf Manor , Carmel Rotschild

We present a novel optical cooling scheme that relies on hyperfine dark states to enhance loading and cooling atoms inside deep optical dipole traps. We demonstrate a seven-fold increase in the number of atoms loaded in the conservative…

Atomic Physics · Physics 2020-03-04 D. S. Naik , H. Eneriz-Imaz , M. Carey , T. Freegarde , F. Minardi , B. Battelier , P. Bouyer , A. Bertoldi

We study theoretically the effects of pump-spot size and location on photon condensates. By exploring the inhomogeneous molecular excitation fraction, we make clear the relation between spatial equilibration, gain clamping and…

Quantum Gases · Physics 2016-01-20 Jonathan Keeling , Peter Kirton

We present a theoretical analysis of a novel scheme for optical cooling of particles that does not in principle require a closed optical transition. A tightly confined laser beam interacting with a trapped particle experiences a phase…

Quantum Physics · Physics 2010-08-23 Peter Horak , André Xuereb , Tim Freegarde

We have studied conditions of photon Bose-Einstein condensate formation that is in thermodynamic equilibrium with ideal gas of two-level Bose atoms below the degeneracy temperature. Equations describing thermodynamic equilibrium in the…

Quantum Gases · Physics 2015-12-31 N. Boichenko , Yu. Slyusarenko

Laboratory plasma production almost always preferentially heats either the ions or electrons, leading to a two-temperature state. High-fidelity modeling of these systems can be achieved with density functional theory molecular dynamics in…

Plasma Physics · Physics 2025-10-20 Zachary A. Johnson , Nathaniel R. Shaffer , Michael S. Murillo

We report a molecular dynamics simulation of a supercooled simple monatomic glass-forming liquid. It is found that the onset of the supercooled regime results in formation of distinct domains of slow diffusion which are confined to the…

Disordered Systems and Neural Networks · Physics 2009-11-07 Mikhail Dzugutov , Sergei I. Simdyankin , Fredrik H. M. Zetterling

Light scattering due to the interaction of photons and acoustic waves present in a dilute inert gas is analyzed through the use of irreversible thermodynamics. The dispersion relation, which governs the dynamics of the density fluctuation…

Statistical Mechanics · Physics 2022-12-19 A. Sandoval-Villalbazo , A. R. Sagaceta-Mejía

We propose and analyze a combined finite volume--nonconforming finite element scheme on general meshes to simulate the two compressible phase flow in porous media. The diffusion term, which can be anisotropic and heterogeneous, is…

Numerical Analysis · Mathematics 2013-06-13 Bilal Saad , Mazen Saad

We demonstrate light-induced formation of coherence in a cold atomic gas system that utilizes the suppression of a competing density wave (DW) order. The condensed atoms are placed in an optical cavity and pumped by an external optical…

Quantum Gases · Physics 2018-12-05 Christoph Georges , Jayson G. Cosme , Ludwig Mathey , Andreas Hemmerich

Atoms in spatially dependent light fields are attracted to local intensity maxima or minima depending on the sign of the frequency difference between the light and the atomic resonance. For light fields confined in open high-Q optical…

Quantum Physics · Physics 2019-08-05 Arthur Jungkind , Wolfgang Niedenzu , Helmut Ritsch

We present a theoretical framework based on second quantization in Liouville space to treat open quantum systems. We consider an ensemble of identical quantum emitters characterized by a discrete set of quantum states. The second…

Quantum Physics · Physics 2023-12-12 V. Sukharnikov , S. Chuchurka , A. Benediktovitch , N. Rohringer

We demonstrate that a dipolar condensate can be prepared into a three-dimensional wavepacket that remains localized when released in free-space. Such self-bound states arise from the interplay of the two-body interactions and quantum…

Quantum Gases · Physics 2016-08-15 D. Baillie , R. M. Wilson , R. N. Bisset , P. B. Blakie

Light emission in sonoluminescence is shown to be a lasing process with a wide gain bandwidth. Population inversion of the gas molecules inside the bubble is achieved by hydrodynamical pumping. Analytic expressions are derived for the…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Pritiraj Mohanty

The glass transition of mesoscopic charged particles in two-dimensional confinement is studied by mode-coupling theory. We consider two types of effective interactions between the particles, corresponding to two different models for the…

Statistical Mechanics · Physics 2015-10-06 Anoosheh Yazdi , Marco Heinen , Alexei Ivlev , Hartmut Löwen , Matthias Sperl

Cavity-mediated cooling of the center--of--mass motion of a transversally, coherently pumped atom along the axis of a high--Q cavity is studied. The internal dynamics of the atomic dipole strongly coupled to the cavity field is treated by a…

Quantum Physics · Physics 2007-05-23 Peter Domokos , Thomas Salzburger , Helmut Ritsch

Using a solvable model, the two-dimensional two-component plasma, we study a Coulomb gas confined in a disk and in an annulus with boundaries that can adsorb some of the negative particles of the system. We obtain explicit analytic…

Statistical Mechanics · Physics 2007-05-23 Lina Merchan , Gabriel Tellez

Optically trapped dielectric objects are well suited for reaching the quantum regime of their center of mass motion in an ultra-high vacuum environment. We show that ground state cooling of an optically trapped nanosphere is achievable when…

Quantum Physics · Physics 2015-06-23 Gambhir Ranjit , Cris Montoya , Andrew A. Geraci

Single-photon cooling is a recently introduced method to cool atoms and molecules for which standard methods might not be applicable. We numerically examine this method in a two-dimensional wedge trap as well as in a two-dimensional…

Quantum Physics · Physics 2014-03-25 V. P. Singh , A. Ruschhaupt

Coherent optical information storage capacity of an atomic Bose-Einstein condensate is examined. Theory of slow light propagation in atomic clouds is generalized to short pulse regime by taking into account group velocity dispersion. It is…

Other Condensed Matter · Physics 2009-11-13 Ozgur E. Mustecaplioglu , Devrim Tarhan