TY - JOUR
AU - Poulin, David
AB - 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.
TI - Quantum reference frames and deformed symmetries
JO - Physical Review D
DO - 10.1103/PhysRevD.77.104012
DA - 2008-05-15
UR - https://www.deepdyve.com/lp/american-physical-society-aps/quantum-reference-frames-and-deformed-symmetries-IQz0XqvWX0
VL - 77
IS - 10
DP - DeepDyve
ER -