Lin Shi-Hsin, Milošević M V, Covaci L, Jankó B, Peeters F M
1] Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 [2] Departement Fysica, Universiteit Antwerpen, Groenenborgerlaan 171, B-2020 Antwerpen, Belgium.
Departement Fysica, Universiteit Antwerpen, Groenenborgerlaan 171, B-2020 Antwerpen, Belgium.
Sci Rep. 2014 Apr 1;4:4542. doi: 10.1038/srep04542.
Despite its apparent simplicity, the idealized model of a particle constrained to move on a circle has intriguing dynamic properties and immediate experimental relevance. While a rotor is rather easy to set up classically, the quantum regime is harder to realize and investigate. Here we demonstrate that the quantum dynamics of quasiparticles in certain classes of nanostructured superconductors can be mapped onto a quantum rotor. Furthermore, we provide a straightforward experimental procedure to convert this nanoscale superconducting rotor into a regular or inverted quantum pendulum with tunable gravitational field, inertia, and drive. We detail how these novel states can be detected via scanning tunneling spectroscopy. The proposed experiments will provide insights into quantum dynamics and quantum chaos.
尽管其看似简单，但受限于在圆周上运动的粒子的理想化模型具有引人入胜的动力学特性以及直接的实验相关性。虽然经典地设置一个转子相当容易，但量子体系却更难实现和研究。在此我们证明，某些类别的纳米结构超导体中的准粒子的量子动力学可以映射到一个量子转子上。此外，我们提供了一个直接的实验程序，将这个纳米级超导转子转换为具有可调谐引力场、惯性和驱动力的常规或倒置量子摆。我们详细说明了如何通过扫描隧道光谱法检测这些新状态。所提出的实验将为量子动力学和量子混沌提供见解。
