Équipe de Recherche en Physique de l'Information Quantique


Abstract = {In the context of constrained quantum mechanics, reference systems are used to construct relational observables that are invariant under the action of the symmetry group. Upon measurement of a relational observable, the reference system undergoes an unavoidable measurement "back-action" that modifies its properties. In a quantum-gravitational setting, it has been argued that such a back-action may produce effects that are described at an effective level as a form of deformed (or doubly) special relativity. We examine this possibility using a simple constrained system that has been extensively studied in the context of quantum information. While our conclusions support the idea of a symmetry deformation, they also reveal a host of other effects that may be relevant to the context of quantum gravity, and could potentially conceal the symmetry deformation.},
Author = {F. Girelli and D. Poulin},
Date-Added = {2007-11-19 15:58:17 -0800},
Date-Modified = {2010-05-06 13:43:33 -0400},
Eprint = {arXiv:0710.4393},
Journal = {Phys. Rev. D},
Keywords = {Reference frame; Gravity; Foundations},
Local-Url = {GP07b.pdf},
Pages = {104012},
Title = {Quantum reference frames and deformed symmetries},
Volume = {77},
Year = {2008}}