通过自发衰减的旋转量子摩擦
Rotational Quantum Friction via Spontaneous Decay
AI总结:
本研究通过量子化双原子极性分子的旋转运动,探讨了在不同 regime 下旋转量子摩擦的特性,发现摩擦力矩与 Ω^3 成正比,并在非马尔可夫 regime 中呈现 Ω 的比例关系。
摘要:
一种属于真空力和涨落领域的有趣效应是量子摩擦。它指的是由于量子真空场对运动物体施加耗散力的预测。在本工作中,我们研究了旋转量子摩擦,即一个双原子极性分子在自由空间中绕其自身质心旋转。我们对旋转运动进行了量子化,并研究了由此产生的耗散作用,由于自发衰减。我们在马尔可夫 regime 中发现,即使在零温度下,摩擦力矩仍与 Ω^3 成正比,并且在旋转量子数 l 很大的极限下,与经典结果一致。在非马尔可夫短时间 regime 中,我们发现摩擦力与 Ω 成正比。
英文摘要:
A fascinating effect belonging to the field of vacuum forces and fluctuations is that of quantum friction. It refers to the prediction of a dissipative force acting on a moving object due to the quantum vacuum field. In this work, we investigate rotational quantum friction where a diatomic polar molecule rotates around its own center of mass in free space. We quantize the rotational motion and investigate the resulting dissipation due to spontaneous decay. We find in the Markovian regime that a friction torque $\propto Ω^3$ persists even for zero temperature, and in agreement with the classical result in the limit of large rotational quantum number $l$. Within the non-Markovian short-time regime we find a friction $\proptoΩ$.
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