Momentum deficit in quantum glasses
Momentum deficit in quantum glasses
复制标题
量子玻璃的动量不足
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
A. F. Andreev
中科院分区：
文献类型：
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作者：
A. F. Andreev
利用隧穿二能级系统的概念，解释了在扭转振子实验中观察到的无序固体4He转动惯量的减小。重点是运动固体中二能级系统的一种特殊的动量亏损量子现象。我们发现，在量子玻璃中可以实现一种本质上不同于正常和超流固体状态的不寻常状态。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，在稳定旋转中表现出正常的行为。
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 that 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 the absence of a superflow, and by the normal behavior in steady rotation.