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Optomechanical cavities in the well-resolved-sideband regime are ideally suited for the study of a myriad of quantum phenomena with mechanical systems, including backaction-evading measurements, mechanical squeezing, and generation of…

Quantum Physics · Physics 2020-05-06 Liu Qiu , Itay Shomroni , Paul Seidler , Tobias J. Kippenberg

Chip-scale atomic devices built around micro-fabricated alkali vapor cells are at the forefront of compact metrology and atomic sensors. We demonstrate a micro-fabricated vapor cell that is actively-pumped to ultra-high-vacuum (UHV) to…

For experiments that require a quantum system to be in the ultra-cold regime, laser cooling is an essential tool. While techniques for laser cooling ions and neutral atoms have been refined and temperatures below the Doppler limit have been…

Atomic Physics · Physics 2024-10-31 Caleb Heuvel-Horwitz , S. F. Yelin

We present an experiment on forced convection where a previously heated object is cooled under the effect of a controlled stream of air. We consider a square copper plate in which temperature variations can be considered negligible and we…

Physics Education · Physics 2024-04-16 Mateo Dutra , Martin Monteiro , Arturo C. Marti

We demonstrate an ultraviolet diode laser system for cooling of trapped ytterbium ions. The laser power and linewidth are comparable to previous systems based on resonant frequency doubling, but the system is simpler, more robust, and less…

Atomic Physics · Physics 2011-01-25 D. Kielpinski , M. Cetina , J. A. Cox , F. X. Kaertner

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

The strong coupling of atoms to optical cavities can improve optical lattice clocks as the cavity enables metrologically useful collective atomic entanglement and high-fidelity measurement. To this end, it is necessary to cool the ensemble…

The efficiency of cavity sideband cooling of trapped molecules is theoretically investigated for the case where the IR transition between two rovibrational states is used as a cycling transition. The molecules are assumed to be trapped…

Quantum Physics · Physics 2011-11-30 Markus Kowalewski , Giovanna Morigi , Pepijn W. H. Pinkse , Regina de Vivie-Riedle

We propose a scheme for laser cooling of negatively charged molecules. We briefly summarise the requirements for such laser cooling and we identify a number of potential candidates. A detailed computation study with C$\_2^-$, the most…

Atomic Physics · Physics 2015-06-23 Pauline Yzombard , Mehdi Hamamda , Sebastian Gerber , Michael Doser , Daniel Comparat

Cooling the centre-of-mass motion is an important tool for levitated optomechanical systems, but it is often not clear which method can practically reach lower temperatures for a particular experiment. We directly compare the parametric and…

Quantum Physics · Physics 2021-08-11 T. W. Penny , A. Pontin , P. F. Barker

We present a detailed theoretical discussion of the effects of ubiquitous laser noise on cooling and the coherent dynamics in opto-mechanical systems. Phase fluctuations of the driving laser induce modulations of the linearized…

Quantum Physics · Physics 2015-05-13 P. Rabl , C. Genes , K. Hammerer , M. Aspelmeyer

We report on cooling the center-of-mass motion of a nanoparticle due to a purely quadratic coupling between its motion and the optical field of a high finesse cavity. The resulting interaction gives rise to a Van der Pol nonlinear damping,…

Quantum Physics · Physics 2021-08-04 N. P. Bullier , A. Pontin , P. F. Barker

We propose a method to implement cavity QED and quantum information processing in high-Q cavities with a single trapped but non-localized atom. The system is beyond the Lamb-Dick limit due to the atomic thermal motion. Our method is based…

Quantum Physics · Physics 2009-11-07 L. -M. Duan , A. Kuzmich , H. J. Kimble

Many protocols in quantum science and technology require initializing a system in a pure quantum state. In the context of the motional state of massive resonators, this enables studying fundamental physics at the elusive quantum-classical…

Quantum Physics · Physics 2023-03-07 Sampo A. Saarinen , Nenad Kralj , Eric C. Langman , Yeghishe Tsaturyan , Albert Schliesser

We consider an atomic Bose-Einstein condensate held within an optical cavity and interacting with laser fields. We show how the interaction of the cavity mode with the condensate can cause energy due to excitations to be coupled to a lossy…

Condensed Matter · Physics 2009-10-31 S. A. Gardiner , K. M. Gheri , P. Zoller

Following the bichromatic sub-Doppler cooling scheme on the D1 line of 40K recently demonstrated in (Fernandes et al. 2012), we introduce a similar technique for 7Li atoms and obtain temperatures of 60 uK while capturing all of the 5x10^8…

The presence of ultra-narrow inter-combination spectroscopic lines in alkaline earth elements places them as promising candidates for optical atomic clocks, quantum computation, and for probing fundmental physics. Doppler cooling of these…

Atomic Physics · Physics 2023-11-15 Korak Biswas , Kushal Patel , S. Sagar Maurya , Pranab Dutta , Umakant D. Rapol , Yeshpal Singh

We predict concurrent selforganisation and cooling of multispecies ensembles of laser-illuminated polarisable particles within a high-Q cavity mode. Resonant collective scattering of laser light into the cavity creates optical potentials…

Quantum Physics · Physics 2012-11-29 Tobias Grießer , Wolfgang Niedenzu , Helmut Ritsch

We consider the problem of controlling the motion of an atom trapped in an optical cavity using continuous feedback. In order to realize such a scheme experimentally, one must be able to perform state estimation of the atomic motion in real…

Quantum Physics · Physics 2007-05-23 Daniel A. Steck , Kurt Jacobs , Hideo Mabuchi , Salman Habib , Tanmoy Bhattacharya

We introduce a scheme for deep laser cooling of molecules based on robust dark states at zero velocity. By simulating this scheme, we show it to be a widely applicable method that can reach the recoil limit or below. We demonstrate and…

Atomic Physics · Physics 2019-07-24 L. Caldwell , J. A. Devlin , H. J. Williams , N. J. Fitch , E. A. Hinds , B. E. Sauer , M. R. Tarbutt