Data di Pubblicazione:
2007
Citazione:
Sine-Gordon solitons, auxiliary fields, and singular limit of a double pendulums chain / M. Cadoni, R. De Leo, G. Gaeta. - In: JOURNAL OF PHYSICS. A, MATHEMATICAL AND THEORETICAL. - ISSN 1751-8113. - 40:43(2007), pp. 12917-12929.
Abstract:
We consider the continuum version of an elastic chain supporting topological
and non-topological degrees of freedom; this generalizes a model for the
dynamics of DNA recently proposed and investigated by ourselves. In a certain
limit, the non-topological degrees of freedom are frozen, and themodel reduces
to the sine-Gordon equations and thus supports well-known topological soliton
solutions. We consider a (singular) perturbative expansion around this limit
and study in particular how the non-topological field assumes the role of an
auxiliary field. This provides a more general framework for the slaving of this
degree of freedom on the topological one, already observed elsewhere in the
context of the mentioned DNA model; in this framework one expects such a
phenomenon to arise in a quite large class of field-theoretical models.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
M. Cadoni, R. De Leo, G. Gaeta
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