Laser-Cooled Ions and Atoms in a Storage Ring
Jan KleinertS. HannemannB. EikeU. EisenbarthM. GrieserRudolf GrimmG. GwinnerS. KarpukG. SaathoffU. SchrammD. SchwalmMatthias Weidemüller
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Ultracold atom
Ultracold atom
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The manipulation of cold atoms with optical fields is a very promising technique for a variety of applications ranging from laser cooling and trapping to coherent atom transport and matter wave interferometry. Optical fields have also been proposed as interesting tools for quantum information processing with cold atoms. In this paper, we present a theoretical study of the dynamics of a cold 87Rb atomic cloud falling in the gravity field in the presence of two crossing dipole guides. The cloud is either deflected or split between the two branches of this guide. We explore the possibilities of optimization of this device and present preliminary results obtained in the case of zero‐temperature dilute Bose‐Einstein condensates.
Ultracold atom
Atom optics
Atom interferometer
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Raman cooling
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The basic principles, methods and experimental results on the generation of cold or ultracold atomic beams and their recent progresses are reviewed. The schemes to produce cold or ultracold atomic beams by laser cooling (Doppler, sub-Doppler and sub-recoil cooling) and magneto-optical trapping technique are introduced in detail, and the applications of cold or ultracold atomic beams in the studies of basic physical problems and atom optics are briefly introduced.
Ultracold atom
Recoil
Atom optics
Doppler cooling
Raman cooling
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Ultracold atom
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Two approaches for solving the long-standing problem of deep laser cooling of neutral magnesium atoms are proposed. The first one uses optical molasses with orthogonal linear polarizations of light waves. The second approach involves a 'nonstandard' magneto-optical trap (NMOT) composed of light waves with elliptical polarizations (in general). Both the widely used semiclassical approach based on the Fokker–Planck equation and quantum treatment fully taking into account the recoil effect are employed for theoretical analysis. The results show the possibility of obtaining temperatures lower than 100 µK simultaneously with a large number of cold atoms ~106 ÷ 107. A new velocity-selective cooling technique allowing one to reach the microkelvin temperature range is also proposed. This technique may have some advantages over, for instance, the shallow-dipole-trap technique utilized by other authors. In the case of magnesium atoms this new technique may be used for obtaining a large number of ultracold atoms (T ~ 1 µK, N > 105). Such a large number of ultracold atoms is crucial issue for metrological and many other applications of cold atoms.
Ultracold atom
Semiclassical physics
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Highly charged ion
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We present an overview of the field of laser manipulation of atoms. Examples and trends are given for: laser cooling and trapping; subrecoil cooling; probes of cold atoms; collective effects in cold atoms samples; atom optics and interferometry.
Ultracold atom
Energetic neutral atom
Atom interferometer
Atom optics
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Betatron
Electron cooling
Cavity Ring-Down Spectroscopy
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Atom Interferometry is proved to be a potential method for measuring the acceleration of atoms due to Gravity, we are now building a feasible system of cold atom gravimeter. In this paper development and the important applications of laser cooling and trapping atoms are introduced, some key techniques which are used to obtain 87Rb cold atoms in our experiments are also discussed.
Gravimeter
Atom interferometer
Ultracold atom
Atom optics
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