Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Complex coordinate rotation method based on gradient optimization   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.

16
The categories of this paper are: stat
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th