论文标题
按形状变化，自主分子电动机和有效的时间晶体动力学旋转
Rotation by shape change, autonomous molecular motors and effective timecrystalline dynamics
论文作者
论文摘要
可变形的身体即使没有角动量也可以旋转，仅通过改变其形状即可。一个很好的例子是掉落的猫，它如何在空气中演习降落在脚上。这里提出了该现象的第一个原理分子级示例。为此，在真空中和在超低的内部温度值中模拟了分离的环丙烷分子中单个原子的热振动，随后的分子运动在频道镜检查中遵循。据观察，在长频镜时间的限制中，即使在没有角动量的情况下，振动也将整个分子的明显均匀旋转组合在一起。然后，这种较大的时间尺度旋转运动以有效的理论方法进行建模，该方法是根据时间晶体式汉密尔顿动力学而建模的。该现象是可测量的温度敏感的。因此，它具有潜在的应用，从自主分子电机的模型到分子水平检测器，传感器和控制技术的发展。
A deformable body can rotate even with no angular momentum, simply by changing its shape. A good example is a falling cat, how it maneuvers in air to land on its feet. Here a first principles molecular level example of the phenomenon is presented. For this the thermal vibrations of individual atoms in an isolated cyclopropane molecule are simulated in vacuum and at ultralow internal temperature values, and the ensuing molecular motion is followed stroboscopically. It is observed that in the limit of long stroboscopic time steps the vibrations combine into an apparent uniform rotation of the entire molecule even in the absence of angular momentum. This large time scale rotational motion is then modeled in an effective theory approach, in terms of timecrystalline Hamiltonian dynamics. The phenomenon is a temperature sensitive measurable. As such it has potential applications that range from models of autonomous molecular motors to development of molecular level detector, sensor and control technologies.
