论文标题
热力学的路径积分分子动力学和绿色旋钮玻色子的功能
Path integral molecular dynamics for thermodynamics and Green's function of ultracold spinor bosons
论文作者
论文摘要
最近，路径积分分子动力学已成功地用于考虑单组分相同玻色子和费米子的热力学。在这项工作中，开发了路径积分分子动力学，以模拟三个维度的热力学，格林的功能和动量分布。作为我们一般方法的一个例子，我们考虑了三维谐波陷阱中多达16个玻色子的热力学。对于非相互作用的旋转玻色子，我们的仿真显示热容量的凸起。然而，随着排斥相互作用强度的增加，我们发现热容量中凸起的逐渐消失。我们认为，可以通过具有光学晶格和磁场Feshbach谐振的超速旋转玻色子来测试该模拟结果，以调整颗粒间相互作用。我们还计算了Green的旋转玻色子的功能和动量分布。我们的工作促进了旋转玻色子的确切数值模拟，其性质是超电压玻色气体中的主要问题之一。
Most recently, the path integral molecular dynamics has been successfully used to consider the thermodynamics of single-component identical bosons and fermions. In this work, the path integral molecular dynamics is developed to simulate the thermodynamics, Green's function and momentum distribution of two-component bosons in three dimensions. As an example of our general method, we consider the thermodynamics of up to sixteen bosons in a three-dimensional harmonic trap. For noninteracting spinor bosons, our simulation shows a bump in the heat capacity. As the repulsive interaction strength increases, however, we find the gradual disappearance of the bump in the heat capacity. We believe this simulation result can be tested by ultracold spinor bosons with optical lattices and magnetic-field Feshbach resonance to tune the inter-particle interaction. We also calculate Green's function and momentum distribution of spinor bosons. Our work facilitates the exact numerical simulation of spinor bosons, whose property is one of the major problems in ultracold Bose gases.
