Department of Electronics and Computer Technology and CITIC-UGR, University of Granada, Granada, Spain.
J Phys Condens Matter. 2013 Jun 12;25(23):235301. doi: 10.1088/0953-8984/25/23/235301. Epub 2013 May 17.
We have studied the existence of quantum revivals in graphene quantum rings within a simplified model. The time evolution of a Gaussian-populated wavepacket shows revivals in monolayer and bilayer graphene rings. We have also studied this behavior for quantum rings in a perpendicular magnetic field. We have found that revival time is an observable that shows different values for monolayer and bilayer graphene quantum rings. In addition, the revival time shows valley degeneracy breaking.
我们在简化模型中研究了石墨烯量子环中的量子复苏现象。高斯填充波包的时间演化在单层和双层石墨烯环中显示出复苏现象。我们还研究了在垂直磁场中量子环的这种行为。我们发现,复苏时间是一个可观测量,对于单层和双层石墨烯量子环具有不同的值。此外,复苏时间表现出谷简并的破坏。