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arXiv physics/0510092physics.atom-ph
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频率跳变光学原子阱的实验研究

Experimental investigation of optical atom traps with a frequency jump

P Ahmadi, G Behinaein, B P Timmons, G S Summy

摘要:

研究了囚禁原子云在囚禁频率跳变下的演化,包括静止和运动质心两种情况。在第一种情况下,频率跳变引发了云的动量和大小的振荡。在某些时候,我们发现温度显着降低。当振幅足够大时,观察到囚禁势的非简谐性引起的局域密度增加。在第二种情况下,振荡通过势的非谐性耦合到质心运动。这引起具有甚至更大振幅的振荡,增强了温度降低效应,并导致在自由膨胀时的各向异性膨胀率。

英文摘要:

We study the evolution of a trapped atomic cloud subject to a trapping frequency jump for two cases: stationary and moving center of mass. In the first case, the frequency jump initiates oscillations in the cloud's momentum and size. At certain times we find the temperature is significantly reduced. When the oscillation amplitude becomes large enough, local density increases induced by the anharmonicity of the trapping potential are observed. In the second case, the oscillations are coupled to the center of mass motion through the anharmonicity of the potential. This induces oscillations with even larger amplitudes, enhancing the temperature reduction effects and leading to nonisotropic expansion rates while expanding freely.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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