A non-commutative Minkowskian spacetime from a quantum AdS algebra

TL;DR

This paper constructs a new non-commutative Minkowskian spacetime via quantum deformation of the AdS algebra, generalizing $$-Minkowski space with a variable Planck scale, maintaining quantum group covariance.

Contribution

It introduces a novel non-commutative Minkowskian spacetime derived from a full quantum group deformation of the AdS algebra, extending previous $$-Minkowski models.

Findings

Explicit non-commutative spaces for Minkowski and AdS are obtained.

The new spacetime preserves space isotropy despite losing Lorentz invariance.

It features a variable fundamental length scale, generalizing $$-Minkowski space.

Abstract

A quantum deformation of the conformal algebra of the Minkowskian spacetime in $(3+1)$ dimensions is identified with a deformation of the $(4+1)$-dimensional AdS algebra. Both Minkowskian and AdS first-order non-commutative spaces are explicitly obtained, and the former coincides with the well known $\kappa$-Minkowski space. Next, by working in the conformal basis, a new non-commutative Minkowskian spacetime is constructed through the full (all orders) dual quantum group spanned by deformed Poincar\'e and dilation symmetries. Although Lorentz invariance is lost, the resulting non-commutative spacetime is quantum group covariant, preserves space isotropy and, furthermore, can be interpreted as a generalization of the $\kappa$-Minkowski space in which a variable fundamental scale (Planck length) appears.