# Cosmology: Synchrotron radiation and quantum gravity

@article{Ellis2004CosmologySR, title={Cosmology: Synchrotron radiation and quantum gravity}, author={John Ellis and Nick E. Mavromatos and Dimitri V. Nanopoulos and Alexander S. Sakharov}, journal={Nature}, year={2004}, volume={428}, pages={-} }

Photons may evade a synchrotron radiation constraint on quantum gravity by violating the equivalence principle.

## 41 Citations

Neutrinos from gamma-ray bursts as a tool to explore quantum-gravity-induced Lorentz violation

- Physics
- 2007

Neutrinos from gamma-ray bursts as a tool to explore quantum-gravity-induced Lorentz violation

Quantum-Spacetime Phenomenology

- PhysicsLiving reviews in relativity
- 2013

I review the current status of phenomenological programs inspired by quantum-spacetime research. I stress in particular the significance of results establishing that certain data analyses provide…

Ultrarelativistic circular orbits of spinning particles in a Schwarzschild field

- Physics
- 2005

Ultrarelativistic circular orbits of spinning particles in a Schwarzschild field described by the Mathisson–Papapetrou equations are considered. The preliminary estimates of the possible synchrotron…

STRING QUANTUM GRAVITY, LORENTZ-INVARIANCE VIOLATION AND GAMMA-RAY ASTRONOMY

- Physics
- 2010

In the first part of the review, I discuss ways of obtaining Lorentz-Invariance-Violating (LIV) space-time foam in the modern context of string theory, involving brane world scenarios. The foamy…

Probing the quantum-gravity realm with slow atoms

- Physics
- 2010

For the study of Planck-scale modifications of the energy–momentum dispersion relation, which had been previously focused on the implications for ultrarelativistic particles, we consider the possible…

Phenomenological description of quantum gravity inspired modified classical electrodynamics

- Physics
- 2007

We discuss a large class of phenomenological models incorporating quantum gravity motivated corrections to electrodynamics. The framework is that of electrodynamics in a birefringent and dispersive…

Neutrinos and the Phenomenology of CPT Violation

- Physics
- 2004

In this talk I review briefly theoretical models and ideas on quantum gravity approaches entailing CPT violation. Then, I discuss various phenomenological tests of CPT violation using neutrinos,…

On Loop Quantum Gravity Phenomenology and the Issue of Lorentz Invariance

- Physics
- 2005

A simple model is constructed which allows to compute modified dispersion relations with effects from loop quantum gravity. Different quantization choices can be realized and their effects on the…

Space-Time Foam may Violate the Principle of Equivalence

- Physics
- 2003

The interactions of different particle species with the foamy space-time fluctuations expected in quantum gravity theories may not be universal, in which case different types of energetic particles…

## References

SHOWING 1-10 OF 23 REFERENCES

Quantum gravity: An astrophysical constraint

- Physics, GeologyNature
- 2003

Observations of radiation from the Crab nebula now place even stronger constraints on the likelihood of detecting the effects of quantum gravity.

Loop quantum gravity and ultrahigh energy cosmic rays

- Physics
- 2003

it has been suggested that quantum-gravitational effects may be playing a decisive role in the propagation of ultrahigh energy cosmic rays. In this article we take the loop quantum gravity approach.…

Noncritical Liouville string escapes constraints on generic models of quantum gravity

- Physics
- 2002

It has recently been pointed out that generic models of quantum gravity must contend with severe phenomenological constraints imposed by gravitational Cerenkov radiation, neutrino oscillations and…

Probing Planck-Scale Physics with Extragalactic Sources?

- Physics
- 2003

At Planck scale, spacetime is "foamy" because of quantum fluctuations predicted by quantum gravity. Here we consider the possibility of using spacetime foam-induced phase incoherence of light from…

Synchrotron radiation from the Crab Nebula discriminates between models of space–time foam

- Physics
- 2004

Microscopic recoil model for light-cone fluctuations in quantum gravity

- Physics
- 1999

We present a microscopic model for light-cone fluctuations in vacuo, which incorporates a treatment of quantum-gravitational recoil effects induced by energetic particles. Treating defects in…

A strong astrophysical constraint on the violation of special relativity by quantum gravity

- PhysicsNature
- 2003

The observation of 100-MeV synchrotron radiation from the Crab nebula is used to improve the previous limit by a factor of 40 million, ruling out this type of Lorentz violation, and thereby providing an important constraint on theories of quantum gravity.

HIGH ENERGY CONSTRAINTS ON LORENTZ SYMMETRY VIOLATIONS

- Physics
- 2002

Lorentz violation at high energies might lead to non linear dispersion relations for the fundamental particles. We analyze observational constraints on these without assuming any a priori equality…

Tests of quantum gravity from observations of γ-ray bursts

- PhysicsNature
- 1998

The recent confirmation that at least some γ-ray bursts originate at cosmological distances suggests that the radiation from them could be used to probe some of the fundamental laws of physics. Here…