A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Robust two-dimensional subrecoil Raman cooling by adiabatic transfer in a tripod atomic system
Tekijät: Ivanov VS, Rozhdestvensky YV, Suominen KA
Kustantaja: AMER PHYSICAL SOC
Julkaisuvuosi: 2012
Journal: Physical Review A
Tietokannassa oleva lehden nimi: PHYSICAL REVIEW A
Lehden akronyymi: PHYS REV A
Artikkelin numero: ARTN 033409
Numero sarjassa: 3
Vuosikerta: 86
Numero: 3
Sivujen määrä: 7
ISSN: 1050-2947
DOI: https://doi.org/10.1103/PhysRevA.86.033409
Tiivistelmä
We demonstrate two-dimensional robust Raman cooling in a four-level tripod system, in which velocity selective population transfer is achieved by a stimulated Raman adiabatic passage. In contrast to basic two-dimensional Raman cooling with square-envelope pulses [Phys. Rev. A 83, 023407 (2011)], the technique presented here allows for a wide variation in the pulse duration and amplitude once the adiabaticity criterion is satisfied. An efficient population transfer together with attainment of a narrow spread of the resonant-velocity group leads to the narrowing of the velocity-distribution spread down to 0.1 upsilon(rec), corresponding to an effective temperature equal to 0.01T(rec). This robust method opens additional possibilities for cooling of neutral atoms.
We demonstrate two-dimensional robust Raman cooling in a four-level tripod system, in which velocity selective population transfer is achieved by a stimulated Raman adiabatic passage. In contrast to basic two-dimensional Raman cooling with square-envelope pulses [Phys. Rev. A 83, 023407 (2011)], the technique presented here allows for a wide variation in the pulse duration and amplitude once the adiabaticity criterion is satisfied. An efficient population transfer together with attainment of a narrow spread of the resonant-velocity group leads to the narrowing of the velocity-distribution spread down to 0.1 upsilon(rec), corresponding to an effective temperature equal to 0.01T(rec). This robust method opens additional possibilities for cooling of neutral atoms.
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