Article
Dynamics in a Two-Level Atom Magneto-Optical Trap Pubblico Deposited
- Abstract
Alkaline-earth-metal atoms present an ideal platform for exploring magneto-optic trap (MOT) dynamics, enabling unique and definitive tests of laser cooling and trapping mechanisms. We have measured the trapping beam intensity, detuning, magnetic-field gradient, trap density, and lifetime dependence of the spring constant κ and damping coefficient α for a 1S0−1P1 88Sr MOT by fitting the oscillatory response of the atom cloud to a step-function force. We find that the observed behavior of κ and α provide a unified and consistent picture of trap dynamics that agrees with Doppler cooling theory at the level of 10%.Additionally, we demonstrate that the trapped atom temperature can be determined directly from measured value of κ and the trap size, in excellent agreement with free-expansion temperature measurements. However, the experimentally determined temperature is much higher than Doppler cooling theory, implying significant additional heating mechanisms.
- Creator
- Date Issued
- 2002-07-15
- Academic Affiliation
- Journal Title
- Journal Issue/Number
- 1
- Journal Volume
- 66
- File Extent
- 011401(R)-1-011401(R)-4
- Ultima modifica
- 2020-01-14
- Resource Type
- Dichiarazione dei diritti
- DOI
- 10.1103/PhysRevA.66.011401
- ISSN
- 1050-2947
- Language
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