5–30 Nov 2012
Nordita
Europe/Stockholm timezone

Some aspects of quantum gravity phenomenology

13 Nov 2012, 10:00
1h
132:028 (Nordita)

132:028

Nordita

Speaker

Nikolaos Mavromatos

Description

In the first part of the talk I will review the status of searches of Quantum Gravity (QG) models that entail non trivial ``optical'' properties of the vacuum, such as a refractive index and/or birefringence, which may be consequences of quantum fluctuating space times during the propagation of high energy cosmic photons from distant astrophysical sources. I will be careful in explaining why recent arrival-time-of-photons measurements from FERMI LAT do not necessarily exclude QG models with induced modifications in the photon's dispersion relation suppressed by a single power of Planck mass. In the second part of the lecture, I will discuss other potential aspects of quantum gravity models, such as Lorentz and CPT Violations, and/or decoherence effects on matter, which do not necessarily lead to the aforementioned energy dependent effective speed of light in the QG medium. In the framework of CPT Violation (CPTV), I will discuss prospects for constraining QG-induced CPTV in entangled states of neutral mesons in future facilities such as DAPhiNE 2, as well as prospects for precision measurements in atomic transitions, and comparison of properties of atoms vs those of anti-atoms, especially in view of the recently available antimatter ``factories''. I will finish the talk with some discussion on using neutrinos from intense astrophysical sources, such as supernovae, as probes of such Lorentz and/or CPT Violating and Decoherening models of QG.

Primary author

Presentation materials