Spin gradient thermometry for ultracold atoms in optical lattices.
Spin gradient thermometry for ultracold atoms in optical lattices.
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DOI：
10.1103/physrevlett.103.245301
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发表时间：
2009-08
影响因子：
8.6
通讯作者：
D. Weld;P. Medley;H. Miyake;D. Hucul;D. Pritchard;W. Ketterle
中科院分区：
文献类型：
--
作者：
D. Weld;P. Medley;H. Miyake;D. Hucul;D. Pritchard;W. Ketterle
我们展示了一种测量光学晶格中超冷原子温度的新的通用方法--自旋梯度测温法。我们实现了由磁场梯度隔开的自旋的混合。测量两个自旋区之间过渡层的宽度是一种新的测温方法，可以在很大的晶格深度和温度范围内工作，包括在Mott绝缘体区域。我们用超冷Rb原子进行了测温，并提出在这个系统中可以实现有趣的自旋物理。测得的最低温度为1nK，表明系统已达到量子区，此时绝缘壳层被超流体层隔开。
We demonstrate spin gradient thermometry, a new general method of measuring the temperature of ultracold atoms in optical lattices. We realize a mixture of spins separated by a magnetic field gradient. Measurement of the width of the transition layer between the two spin domains serves as a new method of thermometry which is observed to work over a broad range of lattice depths and temperatures, including in the Mott insulator regime. We demonstrate the thermometry using ultracold rubidium atoms, and suggest that interesting spin physics can be realized in this system. The lowest measured temperature is 1 nK, indicating that the system has reached the quantum regime, where insulating shells are separated by superfluid layers.