Talk detail

Participant	Bonder, Yuri
Institution	Instituto de Ciencias Nucleares, UNAM - Apartado Postal 70-543 - Coyoacan - CdMx - Mexico

Session	PT4	Accepted		Order	Time
Talk	Oral abstract	Title	Quantum Gravity Phenomenology: A systematic approach
Coauthors
Abstract	Quantum Gravity Phenomenology (QGP) is a program in which the main goal is to find empirical clues of quantum gravity. I will present a systematic "algorithm" for QGP where the key step is to use a general parametrization describing all the possible effects associated with violating a principle of conventional physics. This step allows one to perform self-consistency tests and to compare bounds obtained with different experiments. As an example, I will discuss the phenomenological program to test local Lorentz invariance.
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Session	QG2	Accepted		Order	Time
Talk	Oral abstract	Title	Bounds on the polymer scale from gamma ray bursts: Testing a prediction from Loop Quantum Gravity
Coauthors
Abstract	The polymer representations, which are partially motivated by loop quantum gravity, have been suggested as alternative schemes to quantize the matter fields. Here we apply a version of the polymer representations to the free electromagnetic field, in a reduced phase space setting, and derive the corresponding effective (i.e., semiclassical) Hamiltonian. We study the propagation of an electromagnetic pulse, and we confront our theoretical results with gamma ray burst observations. This comparison reveals that the dimensionless polymer scale must be smaller than 10^{−35}, casting doubts on the possibility that the matter fields are quantized with the polymer representation we employed.
Pdf file