2 papers
gr-qc2005
Fermionic sectors for the Kodama state
Stephon Alexander, Kristin Schleich, Donald M. Witt
Diffeomorphisms not connected to the identity can act nontrivially on the quantum state space for gravity. However, in stark contrast to the case of nonabelian Yang-Mills field the…
hep-th2004
The Gravitational Instability of the Vacuum: Insight into the Cosmological Constant Problem
Stephon Alexander, Manasse Mbonye, John Moffat
A mechanism for suppressing the cosmological constant is developed, based on an analogy with a superconducting phaseshift in which free fermions coupled perturbatively to a weak gr…