Quantum entangled ground states of two spinor Bose-Einstein condensates
Quantum entangled ground states of two spinor Bose-Einstein condensates
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DOI：
10.1103/physreva.84.063634
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发表时间：
2011-12
影响因子：
2.9
通讯作者：
Zhi-Fang Xu;Rong Lü;Li You
中科院分区：
文献类型：
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作者：
Zhi-Fang Xu;Rong Lü;Li You
我们详细回顾了包含量子涨落的自旋 1 玻色-爱因斯坦凝聚二元混合物的非平均场基态相图。单空间模近似下自旋相关哈密顿量中的非对易项使得难以获得精确的本征态。利用自旋 z 分量守恒和总自旋角动量守恒，我们以数值方式导出构建块的信息并评估冯·诺依曼熵以量化基态。研究发现平均场相界基本保持完整，但基态在种间自旋交换和单线态配对相互作用的大参数空间内表现出碎片和纠缠行为。
We revisit in detail the non-mean-field ground-state phase diagram for a binary mixture of spin-1 Bose-Einstein condensates including quantum fluctuations. The noncommuting terms in the spin-dependent Hamiltonian under the single-spatial-mode approximation make it difficult to obtain exact eigenstates. Utilizing spin-z-component conservation and total spin angular momentum conservation, we numerically derive information on the building blocks and evaluate the von Neumann entropy to quantify the ground states. The mean-field phase boundaries are found to remain largely intact, yet the ground states show fragmented and entangled behaviors within large parameter spaces of interspecies spin-exchange and singlet-pairing interactions.