Evaporative cooling in a radio-frequency trap

Garrido Alzar, Carlos L, Perrin, Hélène, Garraway, Barry M and Lorent, Vincent (2006) Evaporative cooling in a radio-frequency trap. Physical Review A, 74 (5). 0534131-05341310. ISSN 1050-2947

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A theoretical investigation for implementing a scheme of forced evaporative cooling in radio-frequency (rf) adiabatic potentials is presented. Supposing the atoms to be trapped in a combination of a dc magnetic field and a rf field at frequency 1, the cooling procedure is facilitated using a second rf source at frequency 2. This second rf field produces a controlled coupling between the spin states dressed by 1. The evaporation is then possible in a pulsed or continuous mode. In the pulsed case, atoms with a given energy are transferred into untrapped dressed states by abruptly switching off the 2 coupling. In the continuous case, it is possible for energetic atoms to adiabatically follow the doubly dressed states and escape out of the trap. Our results also show that when 1 and 2 are separated by at least the Rabi frequency associated with 1, additional evaporation zones appear which can make this process more efficient.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: Barry Garraway
Date Deposited: 06 Feb 2012 18:45
Last Modified: 01 Jul 2019 13:30
URI: http://sro.sussex.ac.uk/id/eprint/18144

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