Temporal, matter-wave-dispersion Talbot effect
Temporal, matter-wave-dispersion Talbot effect
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DOI：
10.1103/physrevlett.83.5407
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发表时间：
1999-12-27
影响因子：
8.6
通讯作者：
Phillips, WD
中科院分区：
文献类型：
--
作者：
Deng, L;Hagley, EW;Phillips, WD
我们分析并通过实验证明了一种新的（时间）塔尔博特效应，其中脉冲相位光栅应用于冷原子云（玻色-爱因斯坦凝聚体）。与通常的（空间）塔尔博特效应相反，我们的原子在被脉冲光栅衍射时获得动能。能量增益和物质-波-色散关系产生精确的：（无近轴近似）塔尔博特效应，其中初始波前以“塔尔博特时间”T-T 的倍数重建。我们通过在可变延迟后应用第二个脉冲相位光栅来演示塔尔博特效应。当第二个光栅以 T-T/2 的偶（奇）倍数应用时，它会使第一个脉冲光栅的效果加倍（抵消）。
We analyze and experimentally demonstrate a new (temporal) Talbot effect, where a pulsed phase grating is applied to a cloud of cold atoms (Bose-Einstein condensate). In contrast to the usual (spatial) Talbot effect, our atoms gain kinetic energy when diffracted by that pulsed grating. The energy gain and the matter-wave-dispersion relation result in an exact:(no paraxial approximation) Talbot effect where the initial wave front is reconstructed at multiples of a "Talbot time" T-T. We demonstrate the Talbot effect by applying a second pulsed phase grating after a variable delay. When this second grating is applied at even (odd) multiples of T-T/2, it doubles (cancels) the effect of the first pulsed grating.