Holographic power-law traps for the efficient production of Bose-Einstein condensates
Holographic power-law traps for the efficient production of Bose-Einstein condensates
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DOI：
10.1103/physreva.84.053410
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发表时间：
2011-11-14
影响因子：
2.9
通讯作者：
Cassettari, Donatella
中科院分区：
文献类型：
--
作者：
Bruce, Graham D.;Bromley, Sarah L.;Cassettari, Donatella
我们使用一个相位空间光调制器来产生光分布，其中强度从中心最大值以幂律衰减，阶数范围从2（抛物线）到0.5。我们建议，这些序列可以被用来作为一个依赖于时间的光偶极阱的全光生产玻色-爱因斯坦凝聚体（BEC）在两个阶段：有效的蒸发冷却的陷阱与可调的强度和深度，其次是绝热变换的陷阱，以跨越BEC过渡在一个可逆的方式。现实的实验参数被用来验证这种方法在产生更大的BEC比单独蒸发冷却的能力。
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.