arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2312.02423quant-ph
收藏

例外点附近振幅与相位的兴衰:一种散射矩阵方法

The rise and fall of the amplitude, and phase, around Exceptional Points: a Scattering matrix approach

J. Colín-Gálvez, E. Castaño, G. Báez, V. Domínguez-Rocha

AI总结:

针对具有$\u0002PT$对称性的非厄米开放一维二聚体量子系统,采用散射矩阵方法研究其共振随增益损耗参数的演化,重点分析例外点前后及例外点处S矩阵相位的行为与分布。

摘要:

我们分析了具有$\u0002PT$对称性的非厄米开放一维量子系统的行为。该系统由一个二聚体构成,其平衡的增益和损耗由参数$γ$描述。通过改变$γ$,原本相互分离的系统共振会在例外点(EP)处发生合并。我们利用散射矩阵($S$矩阵)形式理论得到了透射谱,并研究了对应共振的波函数随$γ$的变化关系。具体而言,我们探究了$S$矩阵的相位在EP之前、EP处以及EP之后的行为与分布。

英文摘要:

We analyze the behavior of a non-Hermitian opened one-dimensional quantum system with $\mathcal{PT}$ symmetry. This system is built by a dimer, with balanced gains and losses described by a parameter $γ$. By varying $γ$ the system resonances, which are naturally separated, coalesce at the exceptional point (EP). The transmission spectrum is obtained by means of the scattering matrix ($S$ matrix) formalism and we examine the wave functions corresponding to the resonances as a function of $γ$. Specifically, we look for the behavior and distribution of the phases of the $S$ matrix before, at and after the EP.

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。

↑