Classical flow is inviscid. Here we show that in quantum Wigner’s probability current~$\VEC{J}$ can be effectively viscous. This results in shear suppression in quantum dynamics which enforces Zurek’s limit for the minimum size scale of spotty structures that develop dynamically. Quantum shear suppression is given by gradients of the quantum terms of~$\VEC{J}$’s vorticity. Used as a new measure of quantum dynamics applied to several evolving closed conservative 1D bound state systems, we find that shear suppression explains the saturation at Zurek’s scale limit and additionally singles out special quantum states.

中文翻译：

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量子相空间中的动态剪切抑制

经典流程是无形的。在这里，我们证明，在量子维格纳的概率中，电流〜$ \ VEC {J} $可以有效地具有粘性。这导致量子动力学中的剪切抑制，这对动态发展的斑点结构的最小尺寸尺度实施了Zurek的限制。量子切变抑制是通过〜V VEC {J} $的涡度的量子项的梯度来给出的。作为应用于多个演化的封闭保守一维束缚态系统的一种新的量子动力学度量，我们发现剪切抑制解释了Zurek尺度极限下的饱和，并另外指出了特殊的量子态。