无序和难以捉摸的仲氢超流相
Disorder and the elusive superfluid phase of para-hydrogen
摘要：
本文用量子蒙特卡罗模拟从理论上研究了无序可以使二维仲氢超流相稳定的可能性。我们使用随机分布的散射体模型的混乱，并研究系统的热力学行为作为散射体密度的函数。无序产生没有超流体性质的平衡玻璃相。事实上，氢分子的量子交换倾向即使相对于观察到的散射体排列为规则晶体也会降低，这种物理设置也不会产生超流性。
英文摘要：
The possibility that disorder may stabilize a superfluid phase of para-hydrogen in two dimensions is investigated theoretically by means of Quantum Monte Carlo simulations. We model disorder using a random distribution of scatterers, and study the thermodynamic behavior of the system as a function of the scatterer density. Disorder gives rise to equilibrium glassy phases with no superfluid properties. Indeed, the propensity for quantum exchanges of hydrogen molecules is reduced even with respect to what is observed if the scatterers are arranged as a regular crystal, a physical setting that also yields no superfluidity.
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