Simple Search

Query:

Enter a query and click »Search«...

Format:

Display: entries per page entries

Zbl 0921.35148
Delfino, G.; Mussardo, G.; Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, and International Centre of Theoretical Physics, Strada Costiera 12, 34014 Trieste
Non-integrable aspects of the multi-frequency sine-Gordon model. (English)
[J] Nucl. Phys., B 516, No.3, 675-703 (1998). ISSN 0550-3213

Summary: We consider the two-dimensional quantum field theory of a scalar field self-interacting via two periodic terms of frequencies $\alpha{}$ and $\beta{}$. Looking at the theory as a perturbed sine-Gordon model, we use form factor perturbation theory to analyse the evolution of the spectrum of particle excitations. We show how, within this formalism, the non-locality of the perturbation with respect to the solitons is responsible for their confinement in the perturbed theory. The effects of the frequency ratio $\alpha/\beta$ being a rational or irrational number and the occurrence of massless flows from the Gaussian to the Ising fixed point are also discussed. A generalisation of the Ashkin-Teller model and the massive Schwinger model are presented as examples of application of the formalism.

MSC 2000:: *35Q53 KdV-like equations
81T10 Model quantum field theories

Keywords: perturbed sine-Gordon model; spectrum of particle excitations; Ashkin-Teller model; massive Schwinger model

Cited in: Zbl 0998.81062

Comment on this Item PDF MathML XML ASCII DVI PS BibTeX Online Ordering Article Journal

	Scientific prize winners of the ICM 2010
	Overhang
	Lie groups, physics and geometry. An introduction for physicists, engineers and chemists.

Simple Search

Zentralblatt MATH Berlin [Germany]