6 papers
Thermal false vacuum decay in (1+1)-dimensions: Evidence for non-equilibrium dynamics
Dalila Pîrvu, Andrey Shkerin, Sergey Sibiryakov
We numerically study the evolution of a classical real scalar field in dimensions with initial conditions describing thermal fluctuations around a metastable vacuum. We t…
Thermal False Vacuum Decay Is More Than It Seems
Dalila Pîrvu, Andrey Shkerin, Sergey Sibiryakov
We study the decay of a thermally excited metastable vacuum in classical field theory using real-time numerical simulations. We find a significantly lower decay rate than predicted…
Dark photon limits from patchy dark screening of the cosmic microwave background
Fiona McCarthy, Dalila Pirvu, J. Colin Hill +3
Dark photons that kinetically mix with the Standard Model photon give rise to new spectral anisotropies (patchy dark screening) in the cosmic microwave background (CMB) due to conv…
Axion-Induced Patchy Screening of the Cosmic Microwave Background
Cristina Mondino, Dalila Pîrvu, Junwu Huang +1
Cosmic Microwave Background (CMB) photons can undergo resonant conversion into axions in the presence of magnetized plasma distributed inside non-linear large-scale structure (LSS)…
Bubble velocities and oscillon precursors in first-order phase transitions
Dalila Pîrvu, Matthew C. Johnson, Sergey Sibiryakov
Metastable `false' vacuum states are an important feature of the Standard Model of particle physics and many theories beyond it. Describing the dynamics of a phase transition out o…
Conformally Coupled Scalar in Rotating Black Hole Spacetimes
Finnian Gray, Ian Holst, David Kubiznak +3
We demonstrate separability of conformally coupled scalar field equation in general (off-shell) Kerr-NUT-AdS spacetimes in all dimensions. The separability is intrinsically charact…