We argue that quantum gravity theories that carry a Lie-algebraic modification of the Poincaré and Heisenberg algebras inevitably provide inhomogeneities that may serve as seeds for cosmological structure formation. Furthermore, in this class of theories one must expect a strong polarization and spin dependence of various quantum gravity effects.
International Journal of Modern Physics D
- Pub Date:
- Non-commutative space-time;
- quantum gravity;
- General Relativity and Quantum Cosmology;
- High Energy Physics - Phenomenology
- Awarded an "honourable mention" in the 2007 Gravity Research Foundation Essay Competition