Three-dimensional cooling of cesium atoms in four-beam gray optical molasses

Boiron, Denis; Triché, C.; Meacher, D. R.; Verkerk, P.; Grynberg, G.

doi:10.1103/physreva.52.r3425

Cited by 53 publications

(57 citation statements)

References 7 publications

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“…16. At the same time, results for the three-fermion problem in a single parabolic well and a mean field calculation to describe a two-component BEC-BCS crossover through a Feshbach resonance in 6 Li appeared. 17,18 In this paper, we shall study three-color fermionic systems in an optical lattice.…”

Section: 10mentioning

confidence: 94%

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Trionic phase of ultracold fermions in an optical lattice: A variational study

2008

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To investigate ultracold fermionic atoms of three internal states (colors) in an optical lattice, subject to strong attractive interaction, we study the attractive three-color Hubbard model in infinite dimensions by using a variational approach. We find a quantum phase transition between a weakcoupling superconducting phase and a strong-coupling trionic phase where groups of three atoms are bound to a composite fermion. We show how the Gutzwiller variational theory can be reformulated in terms of an effective field theory with three-body interactions and how this effective field theory can be solved exactly in infinite dimensions by using the methods of dynamical mean field theory.

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Section: 10mentioning

confidence: 94%

“…Such a three-component fermionic system may be created, e.g., by trapping the lowest three hyperfine levels of 6 Li atoms in all-optical setups in large magnetic fields (see Fig. 1).…”

Section: 10mentioning

confidence: 99%

Trionic phase of ultracold fermions in an optical lattice: A variational study

2008

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“…Narrow-line laser cooling was also demonstrated for both lithium [15] and potassium [16]. Recently, even lower temperatures were obtained in gray molasses cooling [17] on the D1 transition for both lithium [18] and potassium [19,20] (12 µK for 39 K [20]). In this paper, we demonstrate a yet lower temperature of 6 µK in D1 gray molasses and we also show that D1 light can be used to optimize previous steps of the optical cooling sequence.…”

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confidence: 99%

Gray-molasses cooling of ³⁹ K to a high phase-space density

Salomon

Fouché

Wang

et al. 2013

EPL

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Abstract. -We present new techniques in cooling 39 K atoms using laser light close to the D1 transition. First, a new compressed-MOT configuration is taking advantage of gray molasses type cooling induced by blue-detuned D1 light. It yields an optimized density of atoms. Then, we use pure D1 gray molasses to further cool the atoms to an ultra-low temperature of 6 µK. The resulting phase-space density is 2 × 10 −4 and will ease future experiments with ultracold potassium. As an example, we use it to directly load up to 3 × 10 7 atoms in a far detuned optical trap, a result that opens the way to the all-optical production of potassium degenerate gases.

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“…-Sub-Doppler cooling using gray molasses was proposed in ref. [12] and realized in the mid '90s on the D 2 atomic transition of cesium and rubidium, allowing one to cool atomic samples close to 6 times the single photon recoil energy [13][14][15] on the F → F = F (F → F = F − 1) optical transition. For any polarization of the local electromagnetic field, the ground state manifold possesses one (two) dark states which are not optically coupled to the excited state by the incident light [12,16].…”

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confidence: 99%