Instability of bubble expansion at zero temperature

In the context of false vacuum decay at zero temperature, it is well known that bubbles expand with uniform proper acceleration. We show this uniformly accelerating expansion suffers from an instability related to bubble size. This can be observed in Minkowski spacetime as a tachyonic mode spectrum fluctuations for energy functional reference frame which wall appears static. such frame, arbitrary small perturbations cause amplifying departure static solution. implies nucleated not critical point rest nucleation but becomes one frame. The aforementioned well-known during finite-temperature phase transitions plasma. It therefore proposed zero-temperature decays seen frames have dual description terms transitions.