We use velocity-selective Raman pulses generated by two diode lasers to cool cesium atoms in 1 dimension to an r.m.s. of 1.2 mm/s. This is about 1/3 of the single-photon recoil velocity vrec = hbark/M, where hbark is the photon momentum and M the atom's mass. The corresponding effective temperature is a factor of 9 below the single-photon recoil temperature given by kB Trec/2 = 1/2Mvrec2. Because of the high cesium mass, this temperature is only (23 ± 5) nanokelvin, the lowest 1D kinetic temperature reported to date
Subrecoil Raman Cooling of Cesium atoms / J. REICHEL; O. MORICE; G.M. TINO; C. SALOMON. - In: EUROPHYSICS LETTERS. - ISSN 0295-5075. - STAMPA. - 28 (7):(1994), pp. 477-482.
Subrecoil Raman Cooling of Cesium atoms
TINO, GUGLIELMO MARIA;
1994
Abstract
We use velocity-selective Raman pulses generated by two diode lasers to cool cesium atoms in 1 dimension to an r.m.s. of 1.2 mm/s. This is about 1/3 of the single-photon recoil velocity vrec = hbark/M, where hbark is the photon momentum and M the atom's mass. The corresponding effective temperature is a factor of 9 below the single-photon recoil temperature given by kB Trec/2 = 1/2Mvrec2. Because of the high cesium mass, this temperature is only (23 ± 5) nanokelvin, the lowest 1D kinetic temperature reported to date
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