Coherent delocalization of atomic wave packets in driven lattice potentials.
Coherent delocalization of atomic wave packets in driven lattice potentials.
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DOI：
10.1103/physrevlett.100.043602
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发表时间：
2008-01
影响因子：
8.6
通讯作者：
V. V. Ivanov-V.;A. Alberti;M. Schioppo;G. Ferrari;M. Artoni;M. Chiofalo;G. Tino
中科院分区：
文献类型：
--
作者：
V. V. Ivanov-V.;A. Alberti;M. Schioppo;G. Ferrari;M. Artoni;M. Chiofalo;G. Tino
加载到相位调制垂直光格势中的原子波包表现出由Wannier-Stark能级间的带内跃迁引起的相干离域动力学。Wannier-Stark带内跃迁在这里观察到通过监测原位波包范围。通过改变调制频率，我们发现在布洛赫频率的整数倍的共振。共振显示了傅立叶有限宽度的询问时间高达2秒。这也可以用于以ppm分辨率确定重力加速度。
Atomic wave packets loaded into a phase-modulated vertical optical-lattice potential exhibit a coherent delocalization dynamics arising from intraband transitions among Wannier-Stark levels. Wannier-Stark intraband transitions are here observed by monitoring the in situ wave-packet extent. By varying the modulation frequency, we find resonances at integer multiples of the Bloch frequency. The resonances show a Fourier-limited width for interrogation times up to 2 s. This can also be used to determine the gravity acceleration with ppm resolution.