复合自旋-1玻色子超交换动力学的微观研究
Microscopic Study on Superexchange Dynamics of Composite Spin-1 Bosons
AI总结:
本文利用量子气体显微镜在一维双组分Bose-Hubbard模型中模拟自旋-1海森堡模型,发现多玻色子增强导致超交换动力学快于自旋-1/2系统,并制备了纠缠qutrit对,为qutrit量子信息处理提供基础。
摘要:
我们报告了基于双组分Bose-Hubbard模型,在一维链中用复合玻色子对自旋-1海森堡模型进行的实验模拟。利用我们具备格点与自旋分辨能力的量子气体显微镜,我们观察到自旋-1系统相比于其自旋-1/2对应系统具有更快的超交换动力学,这归因于多玻色子的增强效应。我们进一步探测了由超交换项和单离子各向异性项驱动的非平衡自旋动力学,揭示了自旋-自旋关联的线性扩展,该扩展受到Lieb-Robinson界限的限制。基于超交换过程,我们制备并验证了由这些复合自旋-1玻色子构成的纠缠qutrit对,有望应用于基于qutrit的量子信息处理。
英文摘要:
We report on an experimental simulation of the spin-1 Heisenberg model with composite bosons in a one-dimensional chain based on the two-component Bose-Hubbard model. Exploiting our site-and spin-resolved quantum gas microscope, we observed faster superexchange dynamics of the spin-1 system compared to its spin-1/2 counterpart, which is attributed to the enhancement effect of multi-bosons. We further probed the non-equilibrium spin dynamics driven by the superexchange and single-ion anisotropy terms, unveiling the linear expansion of the spin-spin correlations, which is limited by the Lieb-Robinson bound. Based on the superexchange process, we prepared and verified the entangled qutrits pairs with these composite spin-1 bosons, potentially being applied in qutrit-based quantum information processing.
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