Motional Sidebands and Direct Measurement of the Cooling Rate in the Resonance Fluorescence of a Single Trapped Ion

Raab, C.; Eschner, J.; Bolle, J.; Oberst, H.; Schmidt-Kaler, F.; Blatt, R.

doi:10.1103/physrevlett.85.538

Cited by 52 publications

(27 citation statements)

References 22 publications

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“…By performing a simple fit to the data, the electric field can be minimized to better than 0.02 V/m, corresponding to excess micromotion energies (due to stray electric fields) below 1 µK×k B . This result is comparable to the most precise micromotion compensation methods based on ion fluorescence signals [22,24,28,29,30,31].…”

Section: Elastic Atom-ion Collisionssupporting

confidence: 63%

Cold atom–ion experiments in hybrid traps

Härter

Denschlag

2014

Contemporary Physics

147

179

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In the last 5 years, a novel field of physics and chemistry has developed in which cold trapped ions and ultracold atomic gases are brought into contact with each other. Combining ion traps with traps for neutral atoms yields a variety of new possibilities for research and experiments. These range from studies of cold atom-ion collisions and atom-ion chemistry to applications in quantum information science and condensed matter related research. In this article we give a brief introduction into this new field and describe some of the perspectives for its future development.

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Section: Elastic Atom-ion Collisionssupporting

confidence: 63%

Cold atom–ion experiments in hybrid traps

Härter

Denschlag

2014

Contemporary Physics

147

179

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“…It is common to form the electrodes of a ring trap from a simple wire loop with a pair of wires for the endcaps (Raab et al, 2000) [ Fig. 1(d)].…”

Section: B Typical Trap Geometriesmentioning

confidence: 99%

Ion-trap measurements of electric-field noise near surfaces

et al. 2015

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Electric-field noise near surfaces is a common problem in diverse areas of physics, and a limiting factor for many precision measurements. There are multiple mechanisms by which such noise is generated, many of which are poorly understood. Laser-cooled, trapped ions provide one of the most sensitive systems to probe electric-field noise at MHz frequencies and over a distance range 30 − 3000 µm from the surface. Over recent years numerous experiments have reported spectral densities of electric-field noise inferred from ion heating-rate measurements and several different theoretical explanations for the observed noise characteristics have been proposed. This paper provides an extensive summary and critical review of electric-field noise measurements in ion traps, and compares these experimental findings with known and conjectured mechanisms for the origin of this noise. This reveals that the presence of multiple noise sources, as well as the different scalings added by geometrical considerations, complicate the interpretation of these results. It is thus the purpose of this review to assess which conclusions can be reasonably drawn from the existing data, and which important questions are still open. In so doing it provides a framework for future investigations of surface-noise processes.

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“…An alternative way of individually resolving the sidebands is to use a heterodyne technique. A similar technique has been demonstrated to enable resolving motional sidebands 12 of a laser-cooled ion (Raab et al (2000)). In such an experiment, the cooling light which couples back to the fiber taper is mixed with a strong local oscillator beam at a different frequency ω l − Ω AOM with Ω AOM > Ω m .…”

Section: Direct Sideband Spectroscopymentioning

confidence: 99%

Cavity Optomechanics with Whispering-Gallery Mode Optical Micro-Resonators

Schließer

Kippenberg

2010

Advances in Atomic, Molecular, and Optical Physics

114

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Parametric coupling of optical and mechanical degrees of freedom forms the basis of many ultra-sensitive measurements of both force and mechanical displacement. An optical cavity with a mechanically compliant boundary enhances the optomechanical interaction, which gives rise to qualitatively new behavior which can modify the dynamics of the mechanical motion. As early as 1967, in a pioneering work, V. Braginsky analyzed theoretically the role of radiation pressure in the interferometric measurement process, but it has remained experimentally unexplored for many decades. Here, we use whispering-gallery-mode optical microresonators to study these radiation pressure phenomena. Optical microresonators simultaneously host optical and mechanical modes, which are systematically analyzed and optimized to feature ultra-low mechanical dissipation, photon storage times exceeding the mechanical oscillation period (i.e. the "resolved-sideband regime") and large optomechanical coupling. In this manner, it is demonstrated for the first time that dynamical backaction can be employed to cool mechanical modes, i.e., to reduce their thermally excited random motion. Utilizing this novel technique together with cryogenic pre-cooling of the mechanical oscillator, the phonon occupation of mechanical radial-breathing modes could be reduced to n = 63 ± 20 excitation quanta. The corresponding displacement fluctuations are monitored interferometrically with a sensitivity at the level of 1 · 10 −18 m/ √ Hz, which is below the imprecision at the standard quantum limit (SQL). This implies that the readout is already in principle sufficient to measure the quantum mechanical zero-point position fluctuations of the mechanical mode. Moreover, it is shown that optical measurement techniques employed here are operating in a near-ideal manner according to the principles of quantum measurement, displaying a backaction-imprecision product close to the quantum limit.

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Motional Sidebands and Direct Measurement of the Cooling Rate in the Resonance Fluorescence of a Single Trapped Ion

Cited by 52 publications

References 22 publications

Cold atom–ion experiments in hybrid traps

Cold atom–ion experiments in hybrid traps

Ion-trap measurements of electric-field noise near surfaces

Cavity Optomechanics with Whispering-Gallery Mode Optical Micro-Resonators

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