Holographic power-law traps for the efficient production of Bose-Einstein condensates

被引:18
作者
Bruce, Graham D. [1 ]
Bromley, Sarah L. [1 ]
Smirne, Giuseppe [1 ]
Torralbo-Campo, Lara [1 ]
Cassettari, Donatella [1 ]
机构
[1] Univ St Andrews, Sch Phys & Astron, Scottish Univ Phys Alliance, St Andrews KY16 9SS, Fife, Scotland
来源
PHYSICAL REVIEW A | 2011年 / 84卷 / 05期
基金
英国工程与自然科学研究理事会;
关键词
SINGLE ATOMS; MANIPULATION; GENERATION;
D O I
10.1103/PhysRevA.84.053410
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We use a phase-only spatial light modulator to generate light distributions in which the intensity decays as a power law from a central maximum with order ranging from 2 (parabolic) to 0.5. We suggest that a sequence of these can be used as a time-dependent optical dipole trap for all-optical production of Bose-Einstein condensates (BECs) in two stages: efficient evaporative cooling in a trap with adjustable strength and depth, followed by an adiabatic transformation of the trap order to cross the BEC transition in a reversible way. Realistic experimental parameters are used to verify the capability of this approach in producing larger BECs than by evaporative cooling alone.
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页数:6
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