Adiabatic passage in an open multilevel system
- National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW (United Kingdom)
The preparation of a sample of ultra cold caesium atoms in an m{sub F}=0 Zeeman sublevel of the F=3 ground state is demonstrated, using cooling in an optical lattice and adiabatic passage. 97% of the atoms finally detected in the experiment populate the m{sub F}=0 sublevel at a temperature of 300 nK. Microwave spectroscopy is used to measure the adiabatic transfer directly and its dependence on various experimental parameters. A theoretical model is provided to estimate the upper limit for the efficiency of adiabatic transfer in a multilevel system with nonresonant excitation. The results constitute significant progress towards constructing a caesium fountain frequency standard operating in the nK temperature range.
- OSTI ID:
- 20717783
- Journal Information:
- Physical Review. A, Vol. 71, Issue 5; Other Information: DOI: 10.1103/PhysRevA.71.053410; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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