Work

Truncated Hilbert space approach to the 2d ϕ 4 theory

Year: 2016

Type: article

Abstract: We apply the massive analogue of the truncated conformal space approach to study the two dimensional ϕ 4 theory in finite volume. We focus on the broken phase and determine the finite size spectrum of the model numerically. We interpret the results in terms of the Bethe-Yang spectrum, from which we extract the infinite volume masses and scattering matrices for various couplings. We compare these results against semiclassical analysis and perturbation theory. We also analyze the critical point of the model and confirm that it is in the Ising universality class.

Source: Journal of High Energy Physics

DOI: 10.1007/jhep10(2016)050

Authors: Zoltan Bajnok, Marton Lajer

Institutions: HUN-REN Wigner Research Centre for Physics, Eötvös Loránd University

Language: English

Topic: Black Holes and Theoretical Physics

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funder: Hungarian Scientific Research Fund

Award: G8562336747