Fast Optimal Frictionless Atom Cooling in Harmonic Traps: Shortcut to Adiabaticity
Fast Optimal Frictionless Atom Cooling in Harmonic Traps: Shortcut to Adiabaticity
复制标题
谐波陷阱中的快速最佳无摩擦原子冷却：实现绝热的捷径
DOI：
10.1103/physrevlett.104.063002
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发表时间：
2010-02-12
影响因子：
8.6
通讯作者：
Muga, J. G.
中科院分区：
文献类型：
--
作者：
Chen, Xi;Ruschhaupt, A.;Muga, J. G.
提出了一种冷却简谐陷阱中原子的方法，这种方法不像在完全缓慢的绝热膨胀中那样进行相空间压缩，即在初始和最终陷阱中保持相同的瞬时能级群，但时间要短得多。这可能要求谐振子陷阱瞬间变成一个驱除抛物线势能。所获得的冷却时间比用最优控制bang-bang方法和实际频率得到的冷却时间要短。
A method is proposed to cool down atoms in a harmonic trap without phase-space compression as in a perfectly slow adiabatic expansion, i.e., keeping the same populations of instantaneous levels in the initial and final traps, but in a much shorter time. This may require that the harmonic trap become transiently an expulsive parabolic potential. The cooling times achieved are shorter than those obtained using optimal-control bang-bang methods and real frequencies.