@article{articlebd7cdea7,
title   = {Powerful method to evaluate the mass gaps of free-particle quantum critical systems},
author = {Alcaraz, Francisco Castilho and Hoyos, José Abel and Pimenta, Rodrigo Alves},
year = {2021},
doi = {10.1103/PhysRevB.104.174206},
journal   = {Physical Review B}
}