Quantum Monte Carlo-based density functional for one-dimensional Bose-Bose mixtures
Quantum Monte Carlo-based density functional for one-dimensional Bose-Bose mixtures
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DOI：
10.1103/physrevresearch.5.023050
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发表时间：
2023-01
影响因子：
4.2
通讯作者：
Jakub Kopyci'nski;L. Parisi;N. Parker;K. Pawłowski
中科院分区：
文献类型：
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作者：
Jakub Kopyci'nski;L. Parisi;N. Parker;K. Pawłowski
我们针对一维中具有竞争相互作用的二元玻色混合物提出了类似 Gross-Pitaevskii 的方程并对其进行了基准测试。我们的方法遵循密度泛函理论和基于精确量子蒙特卡罗 (QMC) 模拟的能量泛函。我们的模型涵盖但超越了流行的李黄杨修正方法。我们首先根据所有交互机制中可用的 QMC 数据对我们的方法进行基准测试，然后研究从头开始多体模拟无法访问的动力学特性。我们的分析包括对单极子模式的研究，并揭示了异常暗孤子的存在。
We propose and benchmark a Gross-Pitaevskii-like equation for two-component Bose mixtures with competing interactions in 1D. Our approach follows the density-functional theory with the energy functional based on the exact Quantum Monte Carlo (QMC) simulations. Our model covers, but goes beyond, the popular approach with the Lee-Huang-Yang corrections. We first benchmark our approach against available QMC data in all interaction regimes and then study dynamical properties, inaccessible by ab initio many-body simulations. Our analysis includes a study of monopole modes and reveals the presence of anomalous dark solitons.