论文标题
旋转哈伯德模型量子模拟器中的量子临界动力学
Quantum critical dynamics in a spinor Hubbard model quantum simulator
论文作者
论文摘要
三维（3D）密切相关的多体系统，尤其是它们在量子相变的动力学，很难在数值上模拟。我们在实验上证明，可以在3D纺纱子bose-Hubbard模型量子模拟器中有效地研究这种复杂的多体动力学，该动力学由由外光学晶格中的抗磁性纺纱剂Bose-Einstein冷凝物组成。我们发现，超出现有理论的范围超出了超氟化物量子量相变的现有理论的范围，并突出显示旋转种群是一种可探测量子关键动力学的新的旋转种群。我们的数据表明，缩放指数与量子相变的性质无关。我们还使用时间依赖性的Gutzwiller近似在较低维度进行数值模拟，从而定性地描述了我们的观察结果。
Three-dimensional (3D) strongly correlated many-body systems, especially their dynamics across quantum phase transitions, are prohibitively difficult to be numerically simulated. We experimentally demonstrate that such complex many-body dynamics can be efficiently studied in a 3D spinor Bose-Hubbard model quantum simulator, consisting of antiferromagnetic spinor Bose-Einstein condensates confined in cubic optical lattices. We find novel dynamics and scaling effects beyond the scope of existing theories at superfluid-insulator quantum phase transitions and highlight spin populations as a new observable to probe the quantum critical dynamics. Our data indicate that the scaling exponents are independent of the nature of the quantum phase transitions. We also conduct numerical simulations in lower dimensions using time-dependent Gutzwiller approximations, which qualitatively describe our observations.
