Causal faster-than-light travel from a localized second time coordinate

Autor(es)

Nastase, Horatiu

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW D; v. 100, n. 4, p. 11-pg., 2019-08-26.

Resumo

I present a general relativistic model with a compactified second time coordinate that a priori allows for causal, yet faster than light travel in the background of a Friedmann-Lemaistre-Robertson-Walker geometry, by local modification of a higher dimensional background geometry, specifically with respect to the radius of the compactified time coordinate. The modification can be induced via the fields of the model. I show that one cannot convert (as possible in special relativistic models, or simple general relativistic models) the superluminality into closed timelike loops violating causality, due to a novel combination of factors, at least for v(max) <= root 2. The physics of the second time is constrained by postulates derived from reasonable physical assumptions. I comment on the possibility of experimental implications of the model. (AU)

• Processo FAPESP: 14/18634-9 - Dualidade gravitação/Teoria de Gauge
• Beneficiário: Victor de Oliveira Rivelles
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 16/01343-7 - ICTP Instituto Sul-Americano para Física Fundamental: um centro regional para física teórica
• Beneficiário: Nathan Jacob Berkovits
• Modalidade de apoio: Auxílio à Pesquisa - Projetos Especiais