Light-cone fluctuations and the renormalized stress tensor of a massless scalar field

We investigate the effects of light-cone fluctuations over the renormalized vacuum expectation value of the stress-energy tensor of a real massless minimally coupled scalar field defined in a (d+1)-dimensional flat space-time with topology R×Td. For modeling the influence of light-cone fluctuations over the quantum field, we consider a random Klein-Gordon equation. We study the case of centered Gaussian processes. After taking into account all the realizations of the random processes, we present the correction caused by random fluctuations. The averaged renormalized vacuum expectation value of the stress-energy associated with the scalar field is presented. © 2013 World Scientific Publishing Company.

Cultura, discurso (autoexpresión) y desarrollo social en el Caribe

Incluye Bibliografía

Principales desafíos al desarrollo social en el Caribe

Incluye Bibliografía

Main challenges of social development in the Caribbean

Includes bibliography

Culture, discourse (self-expression) and social development in the Caribbean

Includes bibliography

Conformally and gauge invariant spin-2 field equations

Using an approach based on the Casimir operators of the de Sitter group, conformally invariant equations for a fundamental spin-2 field are obtained, and their consistency is discussed. It is shown that only when the spin-2 field is interpreted as a 1-form assuming values in the Lie algebra of the translation group, rather than a symmetric second-rank tensor, the field equation is both conformally and gauge invariant. © 2013 Pleiades Publishing, Ltd.

Culture, discourse (self-expression) and social development in the Caribbean

Includes bibliography

Caribe y su estructura de clases incompletas: ensayo sobre la lógica de sus negociaciones con los países metropolitanos

Incluye Bibliografía

Cultura oprimida y creación intelectual

Incluye Bibliografía

Caribbean and its incomplete class structure: essay on the logic of its negotiations with the metropolitan countries

Publicado también con el símbolo E/CEPAL/SEM.10/R.11

Main challenges of social development in the Caribbean

Includes bibliography