Phase Transitions in Early Universe

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...

Phase Transitions in the Universe

During the past two decades, cosmologists turned to particle physics in order to explore the physics of the very early Universe. The main link between the physics of the smallest and largest structures in the Universe is the idea of spontaneous symmetry breaking, familiar from condensed matter physics. Implementing this mechanism into cosmology leads to the interesting possibility that phase tr...

First-order Phase Transitions in an Early-universe Environment

In first-order phase transitions in the early universe, the bubble wall is expected to be significantly slowed-down by its interaction with the surrounding plasma. We examine the behaviour of the phase of the Higgs field after two-bubble collisions, and find that phase differences equilibrate much more quickly in slow-moving bubbles than in those which expand at the speed of light. This could l...

Symmetry structure and phase transitions

We study chiral symmetry structure at finite density and temperature in the presence of external magnetic field and gravity, a situation relevant in the early Universe and in the core of compact stars. We then investigate the dynamical evolution of phase transition in the expanding early Universe and possible formation of quark nuggets and their survival.

Probing early-universe phase transitions with CMB spectral distortions

Cosmological Phase Transitions

It is generally believed that several phase transitions have taken place in the early Universe. The effects of cosmological phase transitions may well have been crucial for the evolution of the Universe, and thus for the existence of life as we know it. The cosmological phase transitions investigated here are related to strong and electroweak interactions. When the Universe was about 10 seconds...