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Nucleation of vacuum bubbles in Brans-Dicke type theory · Around

2010

Nucleation of vacuum bubbles in Brans-Dicke type theory

Kim, Hongsu, Lee, Bum-Hoon, Lee, Wonwoo et al.

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In this paper, we explore the nucleation of vacuum bubbles in the Brans-Dicke type theory of gravity.

In the Euclidean signature, we evaluate the fields at the vacuum bubbles as solutions of the Euler-Lagrange equations of motion as well as the bubble nucleation probabilities by integrating the Euclidean action.
We illustrate three possible ways to obtain vacuum bubbles: true vacuum bubbles for \omega>-3/2, false vacuum bubbles for \omega<-3/2, and false vacuum bubbles for \omega>-3/2 when the vacuum energy of the false vacuum in the potential of the Einstein frame is less than that of the true vacuum.
After the bubble is nucleated at the t=0 surface, we can smoothly interpolate the field combinations to some solutions in the Lorentzian signature and consistently continue their subsequent evolutions.

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