Comments on Challenges for Quantum Gravity

Abstract

We examine radiative corrections arising from Lorentz violating dimension five operators presumably associated with Planck scale physics as recently considered by Myers and Pospelov. We find that observational data result in bounds on the dimensionless parameters of the order $10^{-15}$. These represent the most stringent bounds on Lorentz violation to date.

References in corpus (4)

• Ultraviolet modifications of dispersion relations in effective field theory
• Loop quantum gravity and light propagation
• Astrophysical limits on quantum gravity motivated birefringence
• New Observational Bounds to Quantum Gravity Signals

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