Quantum Gravity Phenomenology and Lorentz Violation
Ted Jacobson, Stefano Liberati, and David Mattingly
TL;DR
This paper reviews how potential Lorentz violation from quantum gravity could be observed, discussing effective field theory parametrizations and summarizing current experimental constraints, especially in quantum electrodynamics at high energies.
Contribution
It provides a concise overview of Lorentz violation phenomenology in quantum gravity, emphasizing effective field theory approaches and recent observational bounds.
Findings
Current constraints limit Lorentz violation effects in QED at high energies.
Effective field theory is a useful framework for parametrizing Lorentz violation.
Observational prospects for detecting quantum gravity effects are improving.
Abstract
If quantum gravity violates Lorentz symmetry, the prospects for observational guidance in understanding quantum gravity improve considerably. This article briefly reviews previous work on Lorentz violation (LV) and discusses aspects of the effective field theory framework for parametrizing LV effects. Current observational constraints on LV are then summarized, focusing on effects in QED at order E/M_Planck.
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