Analytic resurgence in the O(4) model
Sign Up to like & getrecommendations! Published in 2022 at "Journal of High Energy Physics"
DOI: 10.1007/jhep04(2022)043
Abstract: Abstract We study the perturbative expansion of the ground state energy in the presence of an external field coupled to a conserved charge in the integrable two-dimensional O(4) nonlinear sigma model. By solving Volin’s algebraic… read more here.
Keywords: perturbative series; resurgence; model; analytic resurgence ... See more keywords
Exponential functions of perturbative series and elimination of secular divergences in time-dependent perturbation theory in quantum mechanics
Sign Up to like & getrecommendations! Published in 2017 at "Results in physics"
DOI: 10.1016/j.rinp.2017.02.007
Abstract: Abstract The difficulty that the probabilities infinitely increase with time when the time is large enough in time-dependent perturbation theory for quantum systems with finite number of levels is treated by means of simply transforming… read more here.
Keywords: dependent perturbation; time; time dependent; perturbative series ... See more keywords