Heterodyne measurement of the fluorescent radiation of a single trapped ion

Höffges, J. T.; Baldauf, Hanna‐Mari; Eichler, T.; Helmfrid, Sten; Walther, H.

doi:10.1016/s0030-4018(96)00621-9

Cited by 105 publications

(59 citation statements)

References 18 publications

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“…At very high intensities, the coherent component continues to decrease in amplitude, and the incoherent component splits into three separate Lorentzians. The existence of a coherent component in the resonance fluorescence of a single ion was confirmed directly by Höffges et al by a heterodyne measurement [23].…”

Section: Discussionmentioning

confidence: 76%

Complementarity and Young’s interference fringes from two atoms

et al. 1998

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The interference pattern of the resonance fluorescence from a J = 1/2 to J = 1/2 transition of two identical atoms confined in a three-dimensional harmonic potential is calculated. Thermal motion of the atoms is included. Agreement is obtained with experiments [Eichmann et al., Phys. Rev. Lett. 70, 2359(1993]. Contrary to some theoretical predictions, but in agreement with the present calculations, a fringe visibility greater than 50% can be observed with polarization-selective detection. The dependence of the fringe visibility on polarization has a simple interpretation, based on whether or not it is possible in principle to determine which atom emitted the photon.

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Section: Discussionmentioning

confidence: 76%

Complementarity and Young’s interference fringes from two atoms

et al. 1998

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“…1 [15]. Using a slightly simpler scheme, with a frequency shift in only one arm of the heterodyne setup and with a frequency selective photo detector, Höffges et al [16] have observed the elastic part of an ion's resonance fluorescence, but no motional sidebands. In our setup, the fluorescence at right angle to the direction of the laser beams, in the direction of the magnetic field, is collimated with an f/0.7 lens.…”

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confidence: 99%

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

et al. 2000

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Resonance fluorescence of a single trapped ion is spectrally analyzed using a heterodyne technique. Motional sidebands due to the oscillation of the ion in the harmonic trap potential are observed in the fluorescence spectrum. From the width of the sidebands the cooling rate is obtained and found to be in agreement with the theoretical prediction.PACS: 32.80. Pj, 42.50.Lc, 42.50.Vk Since the first preparation of a single atom in a Paul trap and observation of its resonance fluorescence [1], investigation of this light has revealed a range of unique properties. Examples are its nonclassical nature [2] and the highly nonlinear response, in the form of sudden intensity jumps, of a multi-level atom to continuous laser excitation [3]. The fluorescence is, at the same time, a unique tool for determining the state of the atom. This is particularly obvious for a single particle where each photon emission marks the respective projection of the atomic wave function into the final state of the corresponding transition. It is also of great interest to study, through its resonance fluorescence, the motion of a single laser-excited particle, e.g. for investigating laser cooling schemes or in connection with proposals for quantum state manipulation or quantum information processing with trapped particles [4].

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“…Under conditions of strong coupling, a single calcium ion in the cavity provides sufficient gain to build up a laser field [16]. Like a single ion in free space, which was previously shown to be an excellent source of antibunched light [9,10], radiation from a single-ion laser has nonclassical photon statistics and correlations.…”

Section: Figurementioning

confidence: 99%

“…It should be noted that a single ion can also probe the amplitude distribution E( r) of the light field and hence measure its phase. To this end, heterodyne detection of the fluorescent light must be used, with the exciting laser as a local oscillator [8,10].…”

Section: Figurementioning

confidence: 99%

“…This type of atom source is a long sought after gedanken device as well [7]. Single photons have been generated by several processes such as single-atom fluorescence [8,9,10], single-molecule fluorescence [11], two-photon down-conversion [12], and Coulomb blockade of electrons [13], and one-and two-photon Fock states have been generated in the micromaser [14,15]. As these sources do not produce photons on demand, they are better described as "heralded" photon sources, because they are stochastic either in the emission direction or in the time of creation.…”

Section: Introductionmentioning

confidence: 99%

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Generation and Investigation of Number States of the Radiation Field

Walther¹

2003

The Expanding Frontier of Atomic Physics

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The widely discussed applications in quantum information and quantum cryptography require radiation sources capable of producing a fixed number of photons. This paper reviews the work performed in our laboratory to produce these fields on demand. Two different methods are discussed. The first is based on the one-atom maser or micromaser operating under the conditions of the so-called trapping states. In this situation the micromaser stabilises to a photon number state. Recently, we also succeeded in determining the Wigner function of a single-photon state. The second device, recently realised in our laboratory, uses a single trapped ion in an optical cavity.

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Heterodyne measurement of the fluorescent radiation of a single trapped ion

Cited by 105 publications

References 18 publications

Complementarity and Young’s interference fringes from two atoms

Complementarity and Young’s interference fringes from two atoms

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

Generation and Investigation of Number States of the Radiation Field

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