Gray molasses is a method of sub-Doppler laser cooling of atoms. It employs principles from Sisyphus cooling in conjunction with a so-called "dark" state whose transition to the excited state is not addressed by the resonant lasers. Ultracold atomic physics experiments on atomic species with poorly … See more Like Sisyphus cooling, the cooling mechanism of gray molasses relies on a two-photon Raman-type transition between two hyperfine-split ground states mediated by an excited state. Orthogonal superpositions of … See more Dressed-State Picture Denote the two ground states and the excited state of the electron $${\displaystyle g_{-1}\rangle , g_{1}\rangle ,}$$ See more • Sisyphus cooling • Raman spectroscopy See more WebFeb 4, 2024 · Taken together, the successive gray molasses pulses cool all external degrees of freedom, which leads to an increase of the phase-space density (PSD) by a factor of ≈250, allowing to reach a high final PSD of ≈1.7×10−3. These experiments are performed within an optical dipole trap, in which gray molasses works as well as it does …
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WebThe requisite cooling can alternatively be provided by -enhanced gray molasses (GM) on the D 1 transition [15], which has limiting temperatures far below those of the 39 K D 2 bright molasses. The ... WebWe find that our gray molasses cooling scheme brings all atoms from a pre-cooled temperature of 60 µK to 8 µK in 3.5 ms, thus insuring that light-assisted losses are … na lero ライブ
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Webgray-molasses Sisyphus cooling on the F =2→ F =2 transition, and red-detuned D2 repumping light, which gives the trapping force. It is characterized by a higher density and a much lower temperature as compared to standard compressed-MOT using only D2 light [13,14]. We then show deep sub-Doppler cooling in pure D1 gray optical molasses. By ... WebJun 3, 2024 · This unique energy level structure favors dual-frequency dc magneto-optical trapping (MOT) and gray molasses cooling (GMC). We report exceptionally robust cooling of YO at 4 μK over a wide range of laser intensity, detunings (one- … WebGray Heating & Air Conditioning installs air conditioner split systems, roof top package units, heat pumps, ductless split systems, furnaces, evaporative coolers, and exhaust fans. … na nb エアクリ 流用