Detection of a single lithium atom in a magneto-optical trap

Han, Hyok Sang; Yoon, Soon‐Chang; Cho, Dong−Hyun

doi:10.3938/jkps.66.1675

Cited by 4 publications

(6 citation statements)

References 9 publications

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“…As was already apparent in Fig. 3 (a), the fluorescence signal exhibits considerable noise, which was not observed in the MOT fluorescence [10]. We conclude that this noise is caused by fluctuation in lattice-beam parameters such as power and mode matching.…”

Section: Methodssupporting

confidence: 70%

“…In this measurement, the single atom stays trapped for 25 s. The count rate of the fluorescence from a single atom is 1.7 kHz and that from the scattered imaging beam is 3.8 kHz. We note that the fluorescence count rate cor-responds to the photon scattering rate R = 1.7 × 10 5 s −1 and it is only 6% of that from a single atom in a MOT with the same imaging beam intensities [10]. We attribute this reduction to the inhomogeneous broadening of the D2 transition in the lattice.…”

Section: Methodsmentioning

confidence: 84%

“…NA of 0.22 corresponds to a photon-collecting efficiency of 1.3% and the EMCCD has a quantum efficiency of 90% at 671 nm. With further reduction by 0.9 owing to scattering and diffraction losses, one out of 100 fluorescent photons are detected [10].…”

Section: Apparatusmentioning

confidence: 99%

“…NA of 0.22 corresponds to a photon-collecting efficiency of 1.3%, and the EMCCD has a quantum efficiency of 90% at 671 nm. With additional small loss due to scattering and diffraction, the overall detection efficiency  D of the fluorescent photons is 1% [11].…”

Section: Apparatusmentioning

confidence: 99%

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Fluorescence detection of single lithium atoms in an optical lattice using Doppler-cooling beams

Han¹,

Lee²,

Yoon³

et al. 2018

J. Phys. B: At. Mol. Opt. Phys.

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We demonstrate in situ fluorescence detection of 7 Li atoms in a 1D optical lattice with single atom precision. Even though illuminated lithium atoms tend to boil out, when the lattice is deep, molasses beams without extra cooling retain the atoms while producing sufficient fluorescent photons for detection. When the depth of the potential well at an antinode is 2.4 mK, an atom remains trapped for 30 s while scattering probe photons at the rate of 1.7 × 10 5 s −1 . We propose a simple model that describes the dependence of the lifetime of an atom on well depth. When the number of trapped atoms is reduced, a clear stepwise change is observed in integrated fluorescence, indicating the detection of a single atom. At a photon-collecting efficiency of only 1.3% owing to small numerical aperture, the presence or absence of an atom is determined within 300 ms with an error of less than 5 × 10 −4 .

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Section: Methodssupporting

confidence: 70%

Section: Methodsmentioning

confidence: 84%

Section: Apparatusmentioning

confidence: 99%

Section: Apparatusmentioning

confidence: 99%

See 2 more Smart Citations

Fluorescence detection of single lithium atoms in an optical lattice using Doppler-cooling beams

Han¹,

Lee²,

Yoon³

et al. 2018

J. Phys. B: At. Mol. Opt. Phys.

Self Cite

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“…A practical version of the proposed experiment could be done with a single ion rather than a collection of atoms as there will not, obviously, be any interparticle interactions with just a single ion. This is a viable possibility as the methods for creating isolated, trapped, one-particle quantum systems are now firmly established [26][27][28][29][30][31].…”

Section: Discussion-a Feasible Testmentioning

confidence: 99%

Testing Quantum Mechanics with an Ultra-Cold Particle Trap

Riggs¹

2021

Universe

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It is possible to empirically discriminate between the predictions of orthodox (i.e., Copenhagen) quantum theory and the de Broglie−Bohm theory of quantum mechanics. A practical experiment is proposed in which a single, laser-cooled ion inside an ultra-cold particle trap is either found to be near the trap’s walls or not. Detections of the former kind would support the prediction of orthodox quantum theory and of the latter kind would support the de Broglie−Bohm theory. The outcome of this experiment would show which theory gives the more correct description and, consequently, would have far-reaching implications for our understanding of quantum mechanics.

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