In-trap fluorescence detection of atoms in a microscopic dipole trap

Hilliard, Andrew J.; Fung, Y. H.; Sompet, Pimonpan; Carpentier, Alicia V.; Andersen, Mikkel F.

doi:10.1103/physreva.91.053414

Cited by 10 publications

(11 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A high-numericalaperture lens (NA = 0.55) focuses three steerable linearly polarized laser beams (λ = 1064 nm) to a spot size of ω 0 = 1.1 µm to form the tweezers. A fluorescence image confirms the presence of the three isolated atoms [11,54]. The trap oscillation frequencies (measured by Raman sideband spectroscopy) are {210, 210, 34} kHz for 110 mW beam power [55].…”

mentioning

confidence: 84%

See 1 more Smart Citation

Direct Measurements of Collisional Dynamics in Cold Atom Triads

et al. 2020

View full text Add to dashboard Cite

The introduction of optical tweezers for trapping atoms has opened remarkable opportunities for manipulating few-body systems. Here, we present the first bottom-up assembly of atom triads. We directly observe atom loss through inelastic collisions at the single event level, overcoming the substantial challenge in many-atom experiments of distinguishing one-, two-, and three-particle processes. We measure a strong suppression of three-body loss, which is not fully explained by the presently availably theory for three-body processes. The suppression of losses could indicate the presence of local anti-correlations due to the interplay of attractive short range interactions and low dimensional confinement. Our methodology opens a promising pathway in experimental few-body dynamics.

show abstract

mentioning

confidence: 84%

“…The samples' peak density range is then 0.9 − 1.5 × 10 14 atoms/cm −3 . The atoms collide for varying controlled time duration (denoted 'wait time') before the remaining population is determined by using a single photon counting module to detect fluorescence [54,56]. The 'Readout' section of Fig.…”

Section: Arxiv:200105141v1 [Quant-ph] 15 Jan 2020mentioning

confidence: 99%

Direct Measurements of Collisional Dynamics in Cold Atom Triads

et al. 2020

View full text Add to dashboard Cite

show abstract

“…A mechanical shutter in the returning beam path toggles between running and standing wave configurations for the beam. More details on the experimental apparatus and imaging method can be found in [29,46,47]. …”

Section: Experimental Apparatusmentioning

confidence: 99%

“…We experimentally prepare two atoms inside the FORT and observe the evolution of the trap population under the influence of near resonant lights. The experimental procedure is illustrated in Figure 7: We prepare a low number of atoms inside the FORT and determine the number of atoms using methods described in [46,47]. We select those realizations with only two atoms inside the trap.…”

Section: Two-atom Light-assisted Collisions Induced By Red-detuned Lightmentioning

confidence: 99%

Single Atoms Preparation Using Light-Assisted Collisions

2016

View full text Add to dashboard Cite

Abstract:The detailed control achieved over single optically trapped neutral atoms makes them candidates for applications in quantum metrology and quantum information processing. The last few decades have seen different methods developed to optimize the preparation efficiency of single atoms in optical traps. Here we review the near-deterministic preparation of single atoms based on light-assisted collisions and describe how this method can be implemented in different trap regimes. The simplicity and versatility of the method makes it feasible to be employed in future quantum technologies such as a quantum logic device.

show abstract

“…Here, we use the single particle loss induced by the imaging itself as a way to link the mean atom number with the variance. Making use of the fact that imaging accuracy and precision are linked by the requirement of self-consistency is a generic approach [22].…”

Section: Faraday Image Processing and Accuracymentioning

confidence: 99%

Sub-atom shot noise Faraday imaging of ultracold atom clouds

Kristensen

Gajdacz

Pedersen

et al. 2017

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

View full text Add to dashboard Cite

We demonstrate that a dispersive imaging technique based on the Faraday effect can measure the atom number in a large, ultracold atom cloud with a precision below the atom shot noise level. The minimally destructive character of the technique allows us to take multiple images of the same cloud, which enables sub-atom shot noise measurement precision of the atom number and allows for an in situ determination of the measurement precision. We have developed a noise model that quantitatively describes the noise contributions due to photon shot noise in the detected light and the noise associated with single atom loss. This model contains no free parameters and is calculated through an analysis of the fluctuations in the acquired images. For clouds containing N ∼ 5 × 10 6 atoms, we achieve a precision more than a factor of two below the atom shot noise level.

show abstract

In-trap fluorescence detection of atoms in a microscopic dipole trap

Cited by 10 publications

References 40 publications

Direct Measurements of Collisional Dynamics in Cold Atom Triads

Direct Measurements of Collisional Dynamics in Cold Atom Triads

Single Atoms Preparation Using Light-Assisted Collisions

Sub-atom shot noise Faraday imaging of ultracold atom clouds

Contact Info

Product

Resources

About