Optimizing number squeezing when splitting a mesoscopic condensate

Optimizing number squeezing when splitting a mesoscopic condensate
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优化介观凝聚态分裂时的数压缩

DOI:
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发表时间:
2008
期刊:
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通讯作者:
U. Hohenester
U. Hohenester
中科院分区:
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文献类型:
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作者:
J. Grond;J. Schmiedmayer;U. Hohenester

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我们优化了分裂介观玻色-爱因斯坦凝聚体时的数压缩。将最优控制理论应用于冷凝物的现实描述,使我们能够确定一种形式的分裂斜坡,它大大优于绝热分裂。结果可以解释在一个通用的双模模型映射到一个参数谐振子。这种压缩的最佳途径为更长的相位相干性和接近海森堡极限的原子干涉术铺平了道路。
We optimize number squeezing when splitting a mesoscopic Bose-Einstein condensate. Applying optimal control theory to a realistic description of the condensate allowed us to identify a form of the splitting ramp, which drastically outperforms the adiabatic splitting. The results can be interpreted in terms of a generic two-mode model mapped onto a parametric harmonic oscillator. This optimal route to squeezing paves the way to a much longer phase coherence and atom interferometry close to the Heisenberg limit.