Tunneling Potentials for the Tunneling Action: Gauge Invariance

Abstract

We formulate a procedure to obtain a gauge-invariant tunneling rate at zero temperature using the recently developed tunneling potential approach. This procedure relies on a consistent power counting in gauge coupling and a derivative expansion. The tunneling potential approach, while numerically more efficient than the standard bounce solution method, inherits the gauge-dependence of the latter when naively implemented. Using the Abelian Higgs model, we show how to obtain a tunneling rate whose residual gauge-dependence arises solely from the polynomial approximations adopted in the tunneling potential computation.

12 pages, 8 figures; typos corrected

References in corpus (1)

• On the gauge dependence of vacuum transitions at finite temperature

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