arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1607.03062cond-mat.mes-hallquant-ph
收藏

石墨烯中动态类Schwinger对产生的数值计算

Numerical computation of dynamical Schwinger-like pair production in graphene

F. Fillion-Gourdeau, P. Blain, D. Gagnon, C. Lefebvre, S. MacLean

摘要:

评估了浸入均匀随时间变化的电场中的石墨烯样品中产生的电子-空穴对的密度。由于石墨烯中的低能电荷载流子由相对论性量子力学描述,因此计算在强场量子电动力学形式体系内执行,需要在动量空间中求解狄拉克方程。后者是解决使用分裂算子的数值方案在并行计算机上,允许几个字段配置的调查。通过计算一个实际的激光脉冲模型产生的电子动量密度,说明了该方法的强度。我们观察到的量子干涉图案让人想起Landau-Zener-Stückelberg干涉术。

英文摘要:

The density of electron-hole pairs produced in a graphene sample immersed in a homogeneous time-dependent electrical field is evaluated. Because low energy charge carriers in graphene are described by relativistic quantum mechanics, the calculation is performed within the strong field quantum electrodynamics formalism, requiring a solution of the Dirac equation in momentum space. The latter is solved using a split-operator numerical scheme on parallel computers, allowing for the investigation of several field configurations. The strength of the method is illustrated by computing the electron momentum density generated from a realistic laser pulse model. We observe quantum interference patterns reminiscent of Landau-Zener-Stückelberg interferometry.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑