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Wednesday, August 5, 2020 | History

2 edition of Trapped ions and laser cooling II found in the catalog.

Trapped ions and laser cooling II

Trapped ions and laser cooling II

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  • 4 Currently reading

Published by U.S. Dept. of Commerce, National Bureau of Standards : for sale by The Supt. of Docs., U.S. G.P.O. in Washington, D.C .
Written in English

    Subjects:
  • Ions.,
  • Lasers.,
  • Frequency standards.

  • Edition Notes

    Statementedited by David J. Wineland ... [et al.].
    SeriesNBS technical note -- 1324, NBS technical note -- 1324.
    ContributionsWineland, David J.
    The Physical Object
    FormatMicroform
    Paginationviii, 186 p.
    Number of Pages186
    ID Numbers
    Open LibraryOL22389030M

    Four areas in the arena of laser cooled ion trapping have been studied. The driving of individual motional resonances of ions in traps reveals information regarding the efficacy of laser cooling on that motion. Using the phase response to the driving of trapped magnesium and beryllium ions, the damping rate of each motion imposed by the laser. Ions trapped in a harmonic potential are a natural platform to explore the fundamental limits of ampli-tude sensing. These systems have tunable frequencies, high quality factors Q ˘, and can be cooled to near their motional ground state via laser cooling. Mea-surements of weakly driven coherent amplitudes, both smaller and larger than the.

      We have produced ensembles of cold 16 O + 2, 40 Ar +, 12 C 16 O + 2, and various isotopes of barium ions ( Ba +, Ba + and Ba +) via sympathetic cooling with laser-cooled Ba + in a linear radiofrequency trap. The sympathetically cooled species were embedded in the centre of large Ba + Coulomb crystals containing up to ions and were identified by motional . Laser cooling is a relatively new technique that has led to insights into the behavior of atoms as well as confirming with striking detail some of the fundamental notions of quantum mechanics, such as the condensation predicted by S.N. Bose. This elegant technique, whereby atoms, molecules, and even microscopic beads of glass, are trapped.

    Laser cooling includes a number of techniques in which atomic and molecular samples are cooled down to near absolute cooling techniques rely on the fact that when an object (usually an atom) absorbs and re-emits a photon (a particle of light) its momentum changes. For an ensemble of particles, their thermodynamic temperature is proportional to the variance in their velocity. Tunable lasers at work with trapped ions The group’s experimental work builds on trapped ion systems and aims (i) to gain deeper insight into complex dynam-ics that are influenced or even driven by quantum effects, and (ii) to control individual atoms and molecules at the highest level possible to set up many-body (model) systems.


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Trapped ions and laser cooling II Download PDF EPUB FB2

Laser Cooling of two trapped ions: Sideband cooling beyond the Lamb{Dicke limit. Morigi(1), J. Eschner(2), J.I. Cirac(1) and P. Zoller(1) (1)Institut f¨ur Theoretische Physik, Universit¨at Innsbruck, A{ Innsbruck, AUSTRIA, (2)Institut f¨ur Experimentalphysik, Universit¨at Innsbruck, A{ Innsbruck, AUSTRIA.

(December 8, ) We study laser cooling of two ions that are trapped in. Laser Cooling of Trapped Ions. ITANO, J. BERGQUIST, J. BOLLINGER and D.

WINELAND Time and Frequency Division, National Institute of Standards and Technology Boulder, Cob 1. - Introduction.

Trapping of ions is used to make measurements that are difficult or impossi- ble to perform by other techniques, because the ions can be held for long peri. Therefore laser cooling of trapped ions is reviewed, the current state of the art is reported, and several new cooling techniques are outlined.

The principles of ion trapping and the basic. Ions can be stored for very long times up to many months. Laser cooling of trapped ions is possible in mainly two ways, either Doppler cooling or sideband cooling.

The latter is used to cool ions to the vibrational ground state of the trap enabling high resolution spectroscopy. Addressing such laser cooled trapped ions with lasers, one was able. Trapped ions and laser cooling, V: selected publications of the Ion Storage Group of the NIST Time and Frequency Division by Bergquist, James C.; Bollinger, John J.

CIRAC, GARAY, BLATT, PARKINS, AND ZOLLER 49 II. PRELIMINARY CONSIDERATIONS In the following we will consider laser cooling of a single trapped ion confined in a Paul trap including the full time dependence of the trapping potential.

With the assumption that the ion is confined to spatial dimensions smaller than the optical wavelength (Lamb-Dicke limit).

() published the first laser cooling experiment, in which they cooled a cloud of Mg ions held in a Penning trap. At essentially the same time, Neuhauser, Hohen-statt, Toschek and Dehmelt () also reported laser cooling of trapped Ba1 ions.

Those laser cooling experiments of were a dra-matic demonstration of the mechanical effects. Wineland and coworkers with trapped Mg1 ions.6 Their seminal papers and the subsequent theoretical work7,8 spurred more sophisticated and more elaborate investiga-tions of cooling of atoms and ions.

Work with laser-cooled single trapped ions was re-ported first around It was the starting point of the application of trapped ions to. Abstract. Laser cooling was first proposed in by Hänsch and Schawlow, and simultaneously by Wineland and Dehmelt.

After some general remarks on laser cooling in traps we report on experiments featuring two special laser cooling techniques for ions which are stored in Paul traps. This Field Guide provides an overview of the basic principles of laser cooling of atoms, ions, nanoparticles, and solids, including Doppler cooling, polarization gradient cooling, different sub-recoil schemes of laser cooling, forced evaporation, laser cooling with anti-Stokes fluorescence, hybrid laser cooling, and Raman and Brillouin cooling.

Trapped ions and laser cooling, VI: selected publications of the Ion Storage Group of the NIST Time and Frequency Division Item Preview.

Get this from a library. Trapped ions and laser cooling II: selected publications of the Ion Storage Group of the Time and Frequency Division, NIST, Boulder, Colorado. [David J Wineland; National Institute of Standards and Technology (U.S.);].

Laser cooling of trapped ytterbium ions using a four-level optical-excitation scheme Article (PDF Available) in Physical Review A 44(1):RR23 August with 70 Reads How we measure 'reads'.

We now discuss briefly the maximum damping rates that can be expected, calculated from a simple model of the motion of a trapped ion undergoing laser cooling. The damping rates, i.e., the laser cooling rates on the different ion motions, are defined as the decay rate of the amplitude, A, of the ion's oscillation: A = A 0 exp(− γt /2).

Trapped Ions and Laser Cooling 11 Selected publications of the Ion Storage Group of the Time and Frequency Division, NIST, Boulder, Colorado Ed i ted by David J. Wineland Wayne M. ltano James C. Bergquist John J. Bollinger Time and Frequency Division Center for Basic Standards.

Trapped and laser-cooled ions are increasingly used for a variety of modern high-precision experiments, for frequency standard applications, and for quantum information processing.

Therefore laser cooling of trapped ions is reviewed, the current state of the art is reported, and several new cooling techniques are outlined. The principles of ion trapping and the basic concepts of laser cooling. Abstract.

Laser cooling of a neutral plasma is a challenging task because of the high temperatures typically associated with the plasma state. By using an ultracold neutral plasma created by photoionization of an ultracold atomic gas, we avoid this obstacle and demonstrate laser cooling of ions in a neutral plasma.

ultraviolet diode laser system for laser cooling trapped ytterbium ions without frequency doubling. The performance is similar to resonantly doubled laser systems, but with greater efficiency, reduced size, expense and fragility.

The system achieved laser cooling of ytterbium ions in a. Laser cooling of a neutral plasma is a challenging task because of the high temperatures typically associated with the plasma state. By using an ultracold neutral plasma created by photoionization of an ultracold atomic gas, we avoid this obstacle and demonstrate laser cooling of ions in a neutral plasma.

After microseconds of cooling, we. is a platform for academics to share research papers. II. MOTION OF TRAPPED IONS AND LASER COOLING A. Motion of a 40Ca+ ion in a Penning trap In this paper, we will study the axial motion (along the zaxis) of ions in a Penning trap.

Con nement of ions in the axial direction is carried out by a static quadrupolar potential V = U dc(2z 2 2x2 y)=2d 0, where U dc is the applied potential and d.This chapter gathers two lectures which were dedicated to processes involved in general laser cooling and to laser cooling technics specific to trapped particles.

In this last lecture, assumptions about the atomic motion were made, which were directly inspired by the situation of ions trapped in an Radiofrequency (RF) quadrupole trap.Laser cooling of trapped and free atoms has been thoroughly described elsewhere, for details we refer the reader to the more recent reviews [40, 47] and the references therein.

Usually so-called sideband cooling [48, 49] is used to cool one mode of an ion string to its motional ground state.

This is performed by excitation on the first red.