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TurboGAP is a software package designed for efficient molecular dynamics simulations using Gaussian Approximation Potential (GAP) machine-learning interatomic potentials (MLIP). In this work, we enhance the capabilities of TurboGAP for…

Applied Physics · Physics 2026-05-26 Uttiyoarnab Saha , Ali Hamedani , Miguel A. Caro , Andrea E. Sand

Laser cooled atoms are central to modern precision measurements. They are also increasingly important as an enabling technology for experimental cavity quantum electrodynamics, quantum information processing and matter wave interferometry.…

The acceleration of material property calculations while maintaining ab initio accuracy (1 meV/atom) is one of the major challenges in computational physics. In this paper, we introduce a Python package enhancing the computation of (finite…

We demonstrate the possibility of three-dimensional cooling of neutral atoms by illuminating them with two counterpropagating laser beams of mutually orthogonal linear polarization, where one of the lasers is a speckle field, i.e. a highly…

Atomic Physics · Physics 2009-10-31 Peter Horak , Jean-Yves Courtois , Gilbert Grynberg

We study a method of laser-Compton cooling of electron beams. Using a Monte Carlo code, we evaluate the effects of the laser-electron interaction for transverse cooling. The optics with and without chromatic correction for the cooling are…

Accelerator Physics · Physics 2015-06-26 T. Ohgaki

We propose a highly feasible technique with no experimental overhead to rapidly cool the in-plane degrees of freedom of large two-dimensional ion crystals in Penning traps. Through simulations, we demonstrate that our approach enables the…

Quantum Physics · Physics 2024-03-04 Wes Johnson , Athreya Shankar , John Zaris , John Bollinger , Scott E. Parker

We present an open source Python 3 library aimed at practitioners of molecular simulation, especially Monte Carlo simulation. The aims of the library are to facilitate the generation of simulation data for a wide range of problems; and to…

The last few years have seen rapid progress in the application of laser cooling to molecules. In this review, we examine what kinds of molecules can be laser cooled, how to design a suitable cooling scheme, and how the cooling can be…

Atomic Physics · Physics 2021-12-14 N. J. Fitch , M. R. Tarbutt

A direct numerical simulation of many interacting ions in a Penning trap with a rotating wall is presented. The ion dynamics is modelled classically. Both axial and planar Doppler laser cooling are modeled using stochastic momentum impulses…

Plasma Physics · Physics 2019-09-04 Chen Tang , Dominic Meiser , John J. Bollinger , Scott E. Parker

Ions stored in Penning traps may have useful applications in the field of quantum information processing. There are, however, difficulties associated with the laser cooling of one of the radial motions of ions in these traps, namely the…

Quantum Physics · Physics 2022-08-12 R. J. Hendricks , E. S. Phillips , D. M. Segal , R. C. Thompson

A novel laser cooling mechanism was recently demonstrated using a narrow-linewidth optical transition. Counter-propagating laser beams are swept in frequency to cause adiabatic transfer between a ground state and excited state, and Doppler…

Atomic Physics · Physics 2019-09-04 Graham P. Greve , Baochen Wu , James K. Thompson

A planar triplet of diffraction gratings is used to transform a single laser beam into a four-beam tetrahedral magneto-optical trap. This `flat' pyramid diffractor geometry is ideal for future microfabrication. We demonstrate the technique…

Atomic Physics · Physics 2010-10-19 Matthieu Vangeleyn , Paul F. Griffin , Erling Riis , Aidan S. Arnold

Over the past decade, tremendous progress has been made to extend the tools of laser cooling and trapping to molecules. Those same tools have recently been applied to polyatomic molecules (molecules containing three or more atoms). In this…

The ALP Automatic Computing Algorithm, ALPaca, is an open source Python library devoted to studying the phenomenology of Axion-Like Particles (ALPs) with masses in the ranges $m_a \in [0.01 - 10]$ GeV. ALPaca provides a flexible and…

High Energy Physics - Phenomenology · Physics 2025-08-13 Jorge Alda , Marta Fuentes Zamoro , Luca Merlo , Xavier Ponce Díaz , Stefano Rigolin

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 present a method for producing three-dimensional Bose-Einstein condensates using only laser cooling. The phase transition to condensation is crossed with $2.5 {\times} 10^{4}$ $^{87}\mathrm{Rb}$ atoms at a temperature of $T_{\mathrm{c}}…

Atomic Physics · Physics 2019-05-27 Alban Urvoy , Zachary Vendeiro , Joshua Ramette , Albert Adiyatullin , Vladan Vuletić

The THERMOS toolkit has been developed to calculate radiative properties of plasmas. This article contains a brief survey of some of its key features used by calculation of opacities and emissivities and by analysis of specific experiments.…

Plasma Physics · Physics 2019-10-23 I. Yu. Vichev , A. D. Solomyannaya , A. S. Grushin , D. A. Kim

Laser cooling is a key ingredient for quantum control of atomic systems in a variety of settings. In divalent atoms, two-stage Doppler cooling is typically used to bring atoms to the uK regime. Here, we implement a pulsed radial cooling…

Atomic Physics · Physics 2022-09-21 X. Zhang , K. Beloy , Y. S. Hassan , W. F. McGrew , C-C Chen , J. L. Siegel , T. Grogan , A. D. Ludlow

We study the laser cooling of one atom in an harmonic trap beyond the Lamb-Dicke regime. By using sequences of laser pulses of different detunings we show that the atom can be confined into just one state of the trap, either the ground…

Quantum Physics · Physics 2009-10-31 Luis Santos , Maciej Lewenstein

We investigate the dynamics of an ion sympathetically cooled by another laser-cooled ion or small ion crystal. To this end, we develop simple models of the cooling dynamics in the limit of weak Coulomb interactions. Experimentally, we…

Quantum Physics · Physics 2015-10-02 M. Guggemos , D. Heinrich , O. A. Herrera-Sancho , R. Blatt , C. F. Roos