Comparing cavity and ordinary laser cooling within the Lamb-Dicke regime
Comparing cavity and ordinary laser cooling within the Lamb-Dicke regime
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DOI：
10.1080/09500340.2010.543957
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发表时间：
2011-01-01
影响因子：
1.3
通讯作者：
Beige, Almut
中科院分区：
文献类型：
--
作者：
Blake, Tony;Kurcz, Andreas;Beige, Almut
空穴介导的冷却有可能成为将分子物种冷却到极低温度的最有效技术之一。本文分析了在相对较大的腔衰减率kappa和相对较大的声子频率nu的情况下，单激光驱动的腔冷却。结果表明，在Lamb-Dicke近似的有效范围内，腔冷却与普通激光冷却本质上是相同的。这是通过推导一组封闭的速率方程并计算相应的定态声子数和冷却速率来实现的。例如，当nu远大于或远小于kappa时，最小定态声子数标度分别为kappa(2)/16nu(2)(强禁闭状态)和kappa/4nu(弱限制状态)。
Cavity-mediated cooling has the potential to become one of the most efficient techniques to cool molecular species down to very low temperatures. In this paper we analyse cavity cooling with single-laser driving for relatively large cavity decay rates kappa and relatively large phonon frequencies nu. It is shown that cavity cooling and ordinary laser cooling are essentially the same within the validity range of the Lamb-Dicke approximation. This is done by deriving a closed set of rate equations and calculating the corresponding stationary state phonon number and cooling rate. For example, when nu is either much larger or much smaller than kappa, the minimum stationary state phonon number scales as kappa(2)/16 nu(2) (strong confinement regime) and as kappa/4 nu (weak confinement regime), respectively.