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Complex Coordinate Rotation Method Based on Gradient Optimization by Bai, Zhi-Da; Zhong, Zhen-Xiang; Yan, Zong-Chao; Shi, Ting-Yun is a scholarly article available to read on EtoBox.

What is Complex Coordinate Rotation Method Based on Gradient Optimization about?

In atomic, molecular, and nuclear physics, the method of complex coordinate rotation is a widely used theoretical tool for studying resonant states. Here, we propose a novel implementation of this method based on the gradient optimization (CCR-GO). The main strength of the CCR-GO method is that it does not require manual adjustment of optimization parameters in the wave function; instead, a mathematically well-defined optimization path can be followed. Our method is proven to be very efficient in searching resonant positions and widths over a variety of few-body atomic systems, and can significantly improve the accuracy of the results. As a special case, the CCR-GO method is equally capable of dealing with bound-state problems with high accuracy, which is traditionally achieved through the usual extreme conditions of energy itself.

Author

Bai, Zhi-Da; Zhong, Zhen-Xiang; Yan, Zong-Chao; Shi, Ting-Yun

Published

2020

Language

EN