Feedback cooling of a one-electron oscillator.
Feedback cooling of a one-electron oscillator.
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单电子振荡器的反馈冷却。
DOI：
10.1103/physrevlett.90.043001
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发表时间：
2003
影响因子：
8.6
通讯作者：
G. Gabrielse
中科院分区：
文献类型：
--
作者：
Brian D'Urso;Brian Odom;G. Gabrielse
利用电子反馈将单电子振荡器从5.2K冷却到850mK。新的量子跳跃测温法揭示了振子能量的玻尔兹曼分布，并直接测量了相应的温度。电子温度和阻尼率的比率(也是直接测量的)被观察到是一个涨落-耗散不变量，与反馈增益无关，正如对无噪声反馈所预测的那样。反馈冷却导致的线宽急剧减小说明了改进基本测量和对称性测试的可能重要性。
A one-electron oscillator is cooled from 5.2 K to 850 mK using electronic feedback. Novel quantum jump thermometry reveals a Boltzmann distribution of oscillator energies and directly measures the corresponding temperature. The ratio of electron temperature and damping rate (also directly measured) is observed to be a fluctuation-dissipation invariant, independent of feedback gain, as predicted for noiseless feedback. The sharply reduced linewidth that results from feedback cooling illustrates the likely importance for improved fundamental measurements and symmetry tests.