If we live in the false vacuum, there is a probability that spontaneous vacuum decay could occur: quantum fluctuations could result in a bubble of true vacuum that expands at the speed of light.
In the true vacuum, the expectation value of the Higgs field is different. This suggests that the masses of elementary particles would change as the bubble wall passes over them. My question is how this squares with energy conservation: naively it seems that as the bubble passes over a particle it gains energy from nowhere by virtue of it acquiring a greater mass. Can this be explained by energy transfer between the particles and the bubble wall?