论文标题
量蒙特卡洛研究准二维硬核玻色子中的超流体密度：抑制相位滑移的影响
Quantum Monte Carlo study of superfluid density in quasi-one-dimensional hard-core bosons: Effect of suppression of phase slippage
论文作者
论文摘要
我们使用量子蒙特卡洛方法研究了准核玻色子在准二维晶格上的超流体密度。由于相位滑移，在有限温度下，超级流体密度随着系统长度$ \ ell $的增加而迅速下降至零，并且在一个空间维度中，超级流体的过渡温度为零，在准中的尺寸中，在$ \ ell \ ell \ ell \ elly \ rightarrow \ rightarrow \ rightArrow \ rightarrow \ infty $中。我们计算一个模型的超流体密度，该模型不允许使用相位滑移，并表明即使在一维极限下，超流体密度在有限温度下仍保持有限。我们还讨论了如何使用扭转振荡器在准二维系统中观察到有限的超流体密度。
We study the superfluid density of hard-core bosons on quasi-one-dimensional lattices using the quantum Monte Carlo method. Because of phase slippage, the superfluid density drops quickly to zero at finite temperatures with increasing the system length $\ell$ and the superfluid transition temperature is zero in one spatial dimension and also in quasi-one dimension in the limit of $\ell\rightarrow\infty$. We calculate the superfluid density of a model where no phase slippage is allowed and show that the superfluid density remains finite at finite temperatures even in the one-dimensional limit. We also discuss how finite superfluid density can be observed in a quasi-one-dimensional system using a torsional oscillator.
