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Application of Lie transform perturbation method for multidimensional non-Hermitian systems

机译:李变换摄动法在多维非Hermitian系统中的应用

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摘要

Three-dimensional non-Hermitian systems are investigated using classical perturbation theory based on Lie transformations. Analytic expressions for total energy in terms of action variables are derived. Both real and complex semiclassical eigenvalues are obtained by quantizing the action variables. It was found that semiclassical energy eigenvalues calculated with the classical perturbation theory are in very good agreement with exact energies and for certain non-Hermitian systems second-order classical perturbation theory performed better than the second-order Rayleigh–Schroedinger perturbation theory.
机译:使用基于Lie变换的经典扰动理论研究了三维非Hermitian系统。得出了根据动作变量的总能量的解析表达式。真实和复杂的半经典特征值都是通过量化操作变量来获得的。结果发现,用经典扰动理论计算的半经典能量本征值与精确能量非常吻合,并且对于某些非Hermitian系统,二阶经典扰动理论的性能优于二阶瑞利-施罗丁格扰动理论。

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