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Evaporative cooling in a radio-frequency trap

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posted on 2023-06-07, 21:14 authored by Carlos L Garrido Alzar, Hélène Perrin, Barry M. GarrawayBarry M. Garraway, Vincent Lorent
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.

History

Publication status

  • Published

File Version

  • Published version

Journal

Physical Review A

ISSN

1050-2947

Issue

5

Volume

74

Page range

0534131-05341310

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

First Open Access (FOA) Date

2016-03-22

First Compliant Deposit (FCD) Date

2016-11-18

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