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We present an opto-electrical cooling scheme for polar molecules based on a Sisyphus-type cooling cycle in suitably tailored electric trapping fields. Dissipation is provided by spontaneous vibrational decay in a closed level scheme found…

Quantum Physics · Physics 2009-10-07 M. Zeppenfeld , M. Motsch , P. W. H. Pinkse , G. Rempe

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

Cooling of particles to mK-temperatures is essential for a variety of experiments with trapped charged particles. However, many species of interest lack suitable electronic transitions for direct laser cooling. We study theoretically the…

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

Laser cooling has given a boost to atomic physics throughout the last thirty years since it allows one to prepare atoms in motional states which can only be described by quantum mechanics. Most methods, such as Doppler cooling, polarization…

Quantum Physics · Physics 2017-06-19 Peter Asenbaum , Stefan Kuhn , Stefan Nimmrichter , Ugur Sezer , Markus Arndt

The ability of laser cooling for relativistic ion beams is investigated. For this purpose, the excitation of relativistic ions with a continuous wave and a pulsed laser is analyzed, utilizing the optical Bloch equations. The laser cooling…

Accelerator Physics · Physics 2018-03-14 Lewin Eidam , Oliver Boine-Frankenheim , Danyal Winters

Laser cooling to sub-Doppler temperatures by optical molasses is thought to be inhibited in atoms with unresolved, near-degenerate hyperfine structure in the excited state. We demonstrate that such cooling is possible in one to three…

Atomic Physics · Physics 2014-03-24 Paul Hamilton , Geena Kim , Trinity Joshi , Biswaroop Mukherjee , Daniel Tiarks , Holger Müller

Algorithmic cooling methods manipulate an open quantum system in order to lower its temperature below that of the environment. We show that significant cooling is achieved on an ensemble of spin-pair systems by exploiting the long-lived…

There is substantial interest in producing samples of ultracold molecules for possible applications in quantum computation, quantum simulation of condensed matter systems, precision measurements, controlled chemistry, and high precision…

Atomic Physics · Physics 2013-05-30 J. F. Barry , E. S. Shuman , E. B. Norrgard , D. DeMille

We have designed and implemented a straightforward method to deterministically measure the temperature of the selected segment of a cold atom ensemble, and we have also developed an upgrade in the form of nondestructive thermometry. The…

Atomic Physics · Physics 2020-08-19 Xin Wang , Yuan Sun , Hua-Dong Cheng , Jin-Yin Wan , Yan-Ling Meng , Ling Xiao , Liang Liu

Some peculiarities of fast laser cooling of long-lived ion beams in storage rings are discussed. Selective interaction of ions and broadband laser beam with sharp frequency and geometric edges is used while laser and ion beams are partially…

Accelerator Physics · Physics 2013-05-31 E. G. Bessonov , A. L. Osipov

We propose a novel Sisyphus cooling scheme for atoms confined in a far off resonance optical dipole trap. Utilizing the differential trap-induced AC Stark shift, two electronic levels of the atom are resonantly coupled by a cooling laser…

Atomic Physics · Physics 2015-05-30 Vladyslav V. Ivanov , Subhadeep Gupta

Cooling the center-of-mass motion of levitated nanoparticles provides a route to quantum experiments at mesoscopic scales. Here we demonstrate three-dimensional sympathetic cooling and detection of the center-of-mass motion of a levitated…

Optics · Physics 2023-03-28 Dmitry S. Bykov , Lorenzo Dania , Florian Goschin , Tracy E. Northup

We present a cooling method that should be generally applicable to atoms with narrow optical transitions. This technique uses velocity-selective pulses to drive atoms towards a zero-velocity dark state and then quenches the excited state to…

Atomic Physics · Physics 2009-11-07 E. A. Curtis , C. W. Oates , L. Hollberg

Strong optical forces with minimal spontaneous emission are desired for molecular deceleration and atom interferometry applications. We report experimental benchmarking of such a stimulated optical force driven by ultrafast laser pulses. We…

Atomic Physics · Physics 2019-07-23 Xueping Long , Scarlett S. Yu , Andrew M. Jayich , Wesley C. Campbell

We investigate laser cooling of an ensemble of atoms in an optical cavity. We demonstrate that when atomic dipoles are sychronized in the regime of steady-state superradiance, the motion of the atoms may be subject to a giant frictional…

Quantum Physics · Physics 2016-04-20 Minghui Xu , Simon B. Jäger , S. Schütz , J. Cooper , Giovanna Morigi , M. J. Holland

We present state-selected measurements of rotational cooling and excitation rates of CH$^+$ molecular ions by inelastic electron collisions. The experiments are carried out at the Cryogenic Storage Ring, making use of a monoenergetic…

This paper analyses the cooling of a single particle in a harmonic trap with red-detuned laser light with fewer approximations than previously done in the literature. We avoid the adiabatic elimination of the excited atomic state but are…

Quantum Physics · Physics 2015-05-27 Tony Blake , Andreas Kurcz , Norah S. Saleem , Almut Beige

Some of us have recently reported in Science 321 232 (2008) vibrational cooling of translationally cold Cs_2 molecules into the lowest vibrational level v=0 of the singlet X 1Sigma_g ground electronic state. Starting from a sample of cold…

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