http://arxiv.org/abs/1906.10829
Based on the gradient flow, we propose a new method to determine the bounce configuration for false vacuum decay. Our method is applicable to a large class of models with multiple fields. Since the bounce configuration is a saddle point of an action, a naive gradient flow method does not work. We point out that a simple modification of the flow equation can make the bounce configuration its stable fixed point while the false vacuum configuration an unstable one. Consequently, the bounce configuration can be obtained simply by following the flow without a careful choice of an initial configuration. With numerical analysis, we confirm the validity of our claim, checking that the flow equation we propose indeed has solutions that flow into the bounce configuration.
S. Chigusa, T. Moroi and Y. Shoji
Thu, 27 Jun 19
30/62
Comments: 5 pages, 2 figures
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