Superconducting loop quantum gravity and the cosmological constant
arXiv:0806.4382 · doi:10.1016/j.physletb.2009.01.046
Abstract
We argue that the cosmological constant is exponentially suppressed in a candidate ground state of loop quantum gravity as a nonperturbative effect of a holographic Fermi-liquid theory living on a two-dimensional spacetime. Ashtekar connection components, corresponding to degenerate gravitational configurations breaking large gauge invariance and CP symmetry, behave as composite fermions that condense as in Bardeen-Cooper-Schrieffer theory of superconductivity. Cooper pairs admit a description as wormholes on a de Sitter boundary.
10 pages; v2 matches the published version
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- BCS in the Sky: Signatures of Inflationary Fermion Condensation
- The Immirzi Parameter as an Instanton Angle
- Gravity as an emergent phenomenon: a GFT perspective
- Chirality of tensor perturbations for complex values of the Immirzi parameter
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- The analogue cosmological constant in Bose-Einstein condensates: a lesson for quantum gravity
- Linking the Baum-Hawking-Coleman Mechanism with Unimodular Gravity and Vilenkin's Probability Flux
- Quantum gravity, the cosmological constant, and parity transformation
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