Kerman AJ, Vuletic V, Chin C, Chu S
Department of Physics, Stanford University, Stanford, California 94305-4060, USA.
Phys Rev Lett. 2000 Jan 17;84(3):439-42. doi: 10.1103/PhysRevLett.84.439.
We demonstrate a simple, general purpose method to cool neutral atoms. A sample containing 3x10(8) cesium atoms prepared in a magneto-optical trap is cooled and simultaneously spin polarized in 10 ms at a density of 1.1x10(11) cm (-3) to a phase space density nlambda(3)(dB) = 1/500, which is almost 3 orders of magnitude higher than attainable in free space with optical molasses. The technique is based on 3D degenerate Raman sideband cooling in optical lattices and remains efficient even at densities where the mean lattice site occupation is close to unity.
我们展示了一种用于冷却中性原子的简单通用方法。一个包含3×10⁸个在磁光阱中制备的铯原子的样品，在10毫秒内被冷却并同时自旋极化到密度为1.1×10¹¹厘米⁻³，相空间密度nλ³(dB)=1/500，这比用光学糖浆在自由空间中所能达到的密度高出近3个数量级。该技术基于光学晶格中的三维简并拉曼边带冷却，即使在平均晶格位置占有率接近1的密度下也仍然有效。
