Some Aspects on Non-commutative Theories with a compactified Extra-Dimension

Abstract

We study some aspects when one consider the existence of one extra-dimension in addition to a non-commutative space-time. We present here two different examples, where the first one provides a scenario were it is possible to relate the variations on the compactification radius $L$ and the non-commutative parameter $\theta^{\mu\nu}$, recovering the usual Minkowski $(3+1)D$ metric and, in the other one, we can set a simple relationship between this radius and $\theta$, the non-commutative parameter, for the gravitational potential between a point particle and a straight cosmic string in $(2+1)D$.