Controlling dipolar exchange interactions in a dense three-dimensional array of large-spin fermions
Controlling dipolar exchange interactions in a dense three-dimensional array of large-spin fermions
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DOI：
10.1103/physrevresearch.2.023050
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发表时间：
2019-04
影响因子：
4.2
通讯作者：
A. Patscheider;B. Zhu;B. Zhu;L. Chomaz;D. Petter;S. Baier;A. Rey;F. Ferlaino;M. Mark
中科院分区：
文献类型：
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作者：
A. Patscheider;B. Zhu;B. Zhu;L. Chomaz;D. Petter;S. Baier;A. Rey;F. Ferlaino;M. Mark
偶极相互作用在自然界中无处不在，并统治着从生物系统的能量转移到量子磁性的广泛系统的行为。在这里，我们研究了在深三维晶格中的费米子铒原子密集阵列中保持磁化的偶极诱导自旋交换动力学。利用铒的特殊原子性质，我们演示了通过调整偶极子取向和改变大20自旋超精细流形内的初始自旋态来控制自旋动力学。此外，我们展示了通过光控制快速打开和关闭偶极交换动力学的能力。实验观测结果与基于离散相空间方法的数值计算结果在定量上非常一致，该方法捕获了纠缠和超平均场效应。我们的实验为未来探索远程相互作用偶极子的丰富磁行为奠定了基础，包括物质的奇异相和量子信息处理的应用。
Dipolar interactions are ubiquitous in nature and rule the behavior of a broad range of systems spanning from energy transfer in biological systems to quantum magnetism. Here, we study magnetization-conserving dipolar induced spin-exchange dynamics in dense arrays of fermionic erbium atoms confined in a deep three-dimensional lattice. Harnessing the special atomic properties of erbium, we demonstrate control over the spin dynamics by tuning the dipole orientation and changing the initial spin state within the large 20 spin hyperfine manifold. Furthermore, we demonstrate the capability to quickly turn on and off the dipolar exchange dynamics via optical control. The experimental observations are in excellent quantitative agreement with numerical calculations based on discrete phase-space methods, which capture entanglement and beyond-mean field effects. Our experiment sets the stage for future explorations of rich magnetic behaviors in long-range interacting dipoles, including exotic phases of matter and applications for quantum information processing.