| Parametric resonance and cooling on an atom chip |
| |
| 作者姓名： | 颜波 李晓林 柯敏 王育竹 |
| |
| 作者单位： | Key Laboratory for Quantum Optics, Center for Cold Atom
Physics, Shanghai Institute of Optics and Fine Mechanics,
Chinese
Academy of
Sciences, Shanghai 201800, China;Key Laboratory for Quantum Optics, Center for Cold Atom
Physics, Shanghai Institute of Optics and Fine Mechanics,
Chinese
Academy of
Sciences, Shanghai 201800, China;Key Laboratory for Quantum Optics, Center for Cold Atom
Physics, Shanghai Institute of Optics and Fine Mechanics,
Chinese
Academy of
Sciences, Shanghai 201800, China;Key Laboratory for Quantum Optics, Center for Cold Atom
Physics, Shanghai Institute of Optics and Fine Mechanics,
Chinese
Academy of
Sciences, Shanghai 201800, China |
| |
| 基金项目： | Project supported
by the State Key Basic Research Program (Grant No 2001CB309307), the
National Natural Science Foundation of China (Grant Nos 10334050 and
10474105) and Key Oriental Project of
Chinese Academy of Sciences (Grant No KGCX2-SW-100). |
| |
| 摘 要： | This paper observes the parametric excitation on atom chip by measuring the trap loss when applying a parametric modulation. By modulating the current in chip wires, it modulates not only the trap frequency but also the trap position. It shows that the strongest resonance occurs when the modulation frequency equals to the trap frequency. The resonance amplitude increases exponentially with modulation depth. Because the Z-trap is an anharmonic trap, there exists energy selective excitation which would cause parametric cooling. We confirm this effect by observing the temperature of atom cloud dropping.
|
| 关 键 词： | 原子核 参量激发 参量冷却 能量释放 |
| 收稿时间： | 2007-05-24 |
| 修稿时间： | 2007-06-26 |
Parametric resonance and cooling on an atom chip |
| |
| Yan Bo,Li Xiao-Lin,Ke Min and Wang Yu-Zhu.Parametric resonance and cooling on an atom chip[J].Chinese Physics B,2008,17(3):921-926. |
| |
| Authors: | Yan Bo Li Xiao-Lin Ke Min and Wang Yu-Zhu |
| |
| Institution: | Key Laboratory for Quantum Optics, Center for Cold Atom
Physics, Shanghai Institute of Optics and Fine Mechanics,
Chinese
Academy of
Sciences, Shanghai 201800, China |
| |
| Abstract: | This paper observes the parametric excitation on atom chip by
measuring the trap loss when applying a parametric modulation. By
modulating the current in chip wires, it modulates not only the trap
frequency but also the trap position. It shows that the strongest
resonance occurs when the modulation frequency equals to the trap
frequency. The resonance amplitude increases exponentially with
modulation depth. Because the Z-trap is an anharmonic trap, there
exists energy selective excitation which would cause parametric
cooling. We confirm this effect by observing the temperature of atom
cloud dropping. |
| |
| Keywords: | atom chip parametric
excitation parametric cooling |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
| 点击此处可从《中国物理 B》下载免费的PDF全文 |
|
