6 papers
Globally Charged Vacuum Decay
Giulio Barni, Jose R. Espinosa
Vacuum decay at zero temperature is generically described by a real -symmetric Coleman bounce. When the scalar field driving the decay carries a conserved global charge, this…
On quantum tunnelling in the presence of Noether charges
Giulio Barni, Thomas Steingasser
We provide a complete first-principles based discussion of quantum tunnelling out of initial states carrying a conserved Noether charge. Our main result is a simple, unambiguous Eu…
Inverse bubbles from broken supersymmetry
Giulio Barni, Simone Blasi, Miguel Vanvlasselaer
Building upon the recent findings regarding inverse phase transitions in the early universe, we present the first natural realisation of this phenomenon within a supersymmetry-brea…
Gravitational waves from the sound shell model: direct and inverse phase transitions in the early Universe
Giulio Barni, Simone Blasi, Eric Madge +1
Cosmological phase transitions are a frequent phenomenon in particle physics models beyond the Standard Model, and the corresponding gravitational wave signal offers a key probe of…
Super-heated first order phase transitions
Giulio Barni, Andrea Tesi
We study first order phase transitions that occur when the temperature of the system increases and we identify the conditions that lead to super-heating, a phase where the system c…
Electroweak Baryogenesis with BARYONET: a self-contained review of the WKB approach
Giulio Barni
We present a comprehensive, self-contained pedagogical computation of the baryon asymmetry of the Universe within electroweak baryogenesis (EWBG), from the derivation of the semicl…