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26 April 2024

» arxiv » 0805.2937

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Achieving very long lifetimes in optical lattices with pulsed cooling
Michael J. Gibbons ; Soo Y. Kim ; Kevin M. Fortier ; Peyman Ahmadi ; Michael S. Chapman ;
Date:	19 May 2008
Abstract:	We have realized a one dimensional optical lattice for individual atoms with a lifetime >300 s, which is 5 times longer than previously reported. In order to achieve this long lifetime, it is necessary to laser cool the at-oms briefly every 20 s to overcome heating due to technical fluctuations in the trapping potential. Without cooling, we observe negligible atom loss within the first 20 s followed by an exponential decay with a 62 s time constant. We obtain quantitative agreement with the measured fluctuations of the trapping potential and the corresponding theoretical heating rates.
Source:	arXiv, 0805.2937
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