Manipulating dipolar and spin-exchange interactions in spin-1 Bose-Einstein condensates
Manipulating dipolar and spin-exchange interactions in spin-1 Bose-Einstein condensates
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操纵自旋 1 玻色-爱因斯坦凝聚中的偶极和自旋交换相互作用
DOI：
10.1103/physreva.85.053646
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发表时间：
2012-05-29
影响因子：
2.9
通讯作者：
Zhang, Wenxian
中科院分区：
文献类型：
--
作者：
Ning, Bo-Yuan;Yi, S.;Zhang, Wenxian
它仍然是一个挑战，独立操纵磁偶极和自旋交换相互作用，这是纠缠在许多自旋系统，特别是在自旋1玻色-爱因斯坦凝聚。为此，我们提出了一个序列的射频脉冲和周期性的动态去耦序列的光学Feshbach共振脉冲控制的偶极和自旋交换相互作用，分别。我们的分析结果和数值模拟表明，这两种相互作用中的任何一种都可以被抑制，使另一种主导自旋动力学;此外，这两种相互作用可以同时被抑制，以实现具有更高灵敏度的旋量凝聚的磁力计。这种操纵方法在磁共振和自旋电子学中有着广泛的应用。
It remains a challenge to independently manipulate the magnetic dipolar and the spin-exchange interactions, which are entangled in many spin systems, particularly in spin-1 Bose-Einstein condensates. For this purpose, we put forward a sequence of rf pulses and the periodic dynamical decoupling sequence of optical Feshbach resonance pulses to control the dipolar and the spin-exchange interactions, respectively. Our analytic results and the numerical simulations demonstrate that either of the two interactions can be suppressed to make the other dominate the spin dynamics; furthermore, both of the interactions can be simultaneously suppressed to realize spinor-condensate-based magnetometers with a higher sensitivity. This manipulation method may find its wide applications in magnetic resonance and spintronics.