First order phase transitions induced by magnetic fluctuations and dimensional crossover in type I superconductor films

First order phase transitions in a Bianchi type-I universe

Considering the theory of induced gravity coupled to matter fields, taking the φ6 interaction potential model we evaluate the one-loop effective potential in a (3+1)dimensional Bianchi type-I spacetime. It is proved that the φ6 theory can be regularised in (3+1)dimensional curved spacetime. We evaluate the finite temperature effective potential and study the temperature dependence of phase tran...

Comment on : “ First - order phase transitions of type - I superconducting films

The theory of fluctuation induced first order phase transition from normal to uniform (Meissner) superconducting state in a zero external magnetic field was developed for thin films of type I superconductors in a series of papers [1, 2, 3, 4, 5, 6, 7]. The same problem was considered in a recent theoretical investigation [8]. The authors of the paper [8] derived an erroneous effective free ener...

Fluctuations and Bubble Dynamics in First-Order Phase Transitions

We numerically examine the effect of thermal fluctuations on a first-order phase transition in 2+1 dimensions. By focusing on the expansion of a single bubble we are able to calculate changes in the bubble wall’s velocity as well as changes in its structure relative to the standard case where the bubble expands into a homogeneous background. Not only does the wall move faster, but the transitio...

Fluctuation Induced First Order Phase Transitions

We study a U(N) × U(N) symmetric scalar field model in four and three dimensions. First, using our data in four dimensions in the weak coupling region, we demonstrate explicitly that the observed first order phase transition is induced by quantum fluctuations. Next, based on the renormalization group and our new simulation results in three dimensions we argue that even if the UA(1) symmetry is ...

Phenomenological modelling of first order phase transitions in magnetic systems