量子玻璃中的动量亏损
Momentum deficit in quantum glasses
摘要：
利用隧穿二能级系统的概念解释了扭振子实验中观察到的无序固体~ 4 He转动惯量的减小。关键点是运动固体中二能级系统的动量亏损这一奇特的量子现象。我们发现，一个不寻常的状态，这是本质上不同于正常和超流固体状态可以实现在量子玻璃。这种状态的特点是在振荡器实验中转动惯量减小，没有超流，以及在稳定旋转中的正常行为。
英文摘要：
Using the concept of tunneling two level systems we explain the reduction of rotational inertia of disordered solid 4He observed in the torsional oscillator experiments. The key point is a peculiar quantum phenomenon of momentum deficit for two level systems in moving solids. We show that an unusual state which is essentially different from both normal and superfluid solid states can be realized in quantum glasses. This state is characterized by reduced rotational inertia in oscillator experiments, by absence of a superflow, and by normal behavior in steady rotation.
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