2 papers
hep-th2025
Scattering approach for calculating one-loop effective action and vacuum energy
Yuan-Yuan Liu, Shi-Lin Li, Yu-Jie Chen +2
We propose an approach for calculating one-loop effective actions and vacuum energies in quantum field theory. Spectral functions are functions defined by the eigenvalues of an ope…
quant-ph2024
Perturbation-based Non-perturbative Method
Chang Liu, Wen-Du Li, Wu-Sheng Dai
This paper presents a nonperturbative method for solving eigenproblems. This method applies to almost all potentials and provides nonperturbative approximations for any energy leve…