Horizons and Tunneling in the Euclidean False Vacuum

Details Horizons and Tunneling in the Euclidean False Vacuum Horizons and Tunneling in the Euclidean False Vacuum

2007-12-17

arxiv.org/abs/0712.2719v1

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, 5 figures

Scientific paper

In the thin-wall approximation, the decay of a gravitating false vacuum to a lower-energy state is affected by the cosmological horizon structure in both spaces. The nucleation radius of a bubble of true vacuum depends on the surface tension of its boundary and equals the false vacuum cosmological horizon at a critical tension. We argue that there is no tunneling instanton solution beyond the critical tension and argue that there is therefore a bound on allowed membrane tension in theories which rely on semiclassical tunneling to relax the cosmological constant.

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