365 citations · 5.2k across the 57 of their papers we have counts for
35 papers · 1 filter
Benchmarking wall velocities in cosmological phase transitions: Fluid Ansatz and WallGo
Gláuber C. Dorsch, Marek Lewicki, Daniel A. Pinto
A reliable computation of the bubble wall velocity during a cosmological phase transition requires an adequate modeling of the non-equilibrium dynamics in the vicinity of this expa…
From friction scaling to an efficient method for estimating bubble wall velocity
Tomasz Krajewski, Marek Lewicki, Marco Merchand +2
We present a unified description of first-order cosmological phase transition dynamics that links the phenomenological friction model employed in hydrodynamic simulations to the mi…
Impact of cosmic expansion on gravitational wave spectra from strongly supercooled first-order phase transitions
Marek Lewicki, Ville Vaskonen
We compute the gravitational wave spectra from strongly supercooled first-order phase transitions, explicitly incorporating the evolution of the background metric across the transi…
Black holes and gravitational waves from phase transitions in realistic models
Marek Lewicki, Piotr Toczek, Ville Vaskonen
We study realistic models predicting primordial black hole (PBH) formation from density fluctuations generated in a first-order phase transition. We show that the second-order corr…
Steady-state bubbles beyond local thermal equilibrium
Tomasz Krajewski, Marek Lewicki, Ignacy Nałęcz +1
We investigate the hydrodynamic solutions for expanding bubbles in cosmological first-order phase transitions going beyond local thermal equilibrium approximation. Under the assump…
Gravitational waves from cosmic strings in LISA: reconstruction pipeline and physics interpretation
Jose J. Blanco-Pillado, Yanou Cui, Sachiko Kuroyanagi +6
We initiate the LISA template databank for stochastic gravitational wave backgrounds sourced by cosmic strings. We include two templates, an analytical template, which enables more…
Gravitational waves from first-order phase transitions in LISA: reconstruction pipeline and physics interpretation
Chiara Caprini, Ryusuke Jinno, Marek Lewicki +6
We develop a tool for the analysis of stochastic gravitational wave backgrounds from cosmological first-order phase transitions with LISA: we initiate a template databank for these…
LISA Definition Study Report
Monica Colpi, Karsten Danzmann, Martin Hewitson +108
The Laser Interferometer Space Antenna (LISA) is the first scientific endeavour to detect and study gravitational waves from space. LISA will survey the sky for Gravitational Waves…
Bubble-wall velocity in local thermal equilibrium: hydrodynamical simulations vs analytical treatment
Tomasz Krajewski, Marek Lewicki, Mateusz Zych
We perform real-time hydrodynamical simulations of the growth of bubbles formed during cosmological first-order phase transitions under the assumption of local thermal equilibrium.…
Black holes and gravitational waves from slow phase transitions
Marek Lewicki, Piotr Toczek, Ville Vaskonen
Slow first-order phase transitions generate large inhomogeneities that can lead to the formation of primordial black holes (PBHs). We show that the gravitational wave (GW) spectrum…
From Hubble to Bubble
Maciej Kierkla, Giorgio Laverda, Marek Lewicki +4
The detection of a stochastic Gravitational Wave (GW) background sourced by a cosmological phase transition would allow us to see the early Universe from a completely new perspecti…
What is the source of the PTA GW signal?
John Ellis, Malcolm Fairbairn, Gabriele Franciolini +7
The most conservative interpretation of the nHz stochastic gravitational wave background (SGWB) discovered by NANOGrav and other Pulsar Timing Array (PTA) Collaborations is astroph…
Cosmic Superstrings Revisited in Light of NANOGrav 15-Year Data
John Ellis, Marek Lewicki, Chunshan Lin +1
We analyze cosmic superstring models in light of NANOGrav 15-year pulsar timing data. A good fit is found for a string tension and a string intercommu…
Primordial black holes from strong first-order phase transitions
Marek Lewicki, Piotr Toczek, Ville Vaskonen
We study the formation of primordial black holes (PBHs) in strongly supercooled first-order phase transitions. The mechanism is based on the presence of remnants dominated by the f…
Imprints of a Supercooled Phase Transition in the Gravitational Wave Spectrum from a Cosmic String network
Francesc Ferrer, Anish Ghoshal, Marek Lewicki
A network of cosmic strings (CS), if present, would continue emitting gravitational waves (GW) as it evolves throughout the history of the Universe. This results in a characteristi…
Hydrodynamical constraints on bubble wall velocity
Tomasz Krajewski, Marek Lewicki, Mateusz Zych
Terminal velocity reached by bubble walls in first order phase transitions is an important parameter determining both primordial gravitational-wave spectrum and production of baryo…
Distinct signatures of spinning PBH domination and evaporation: doubly peaked gravitational waves, dark relics and CMB complementarity
Nilanjandev Bhaumik, Anish Ghoshal, Rajeev Kumar Jain +1
Ultra-low mass primordial black holes (PBH), which may briefly dominate the energy density of the universe but completely evaporate before the big bang nucleosynthesis (BBN), can l…
Gravitational waves from bubble collisions and fluid motion in strongly supercooled phase transitions
Marek Lewicki, Ville Vaskonen
We estimate the gravitational wave spectra generated in strongly supercooled phase transitions by bubble collisions and fluid motion. We derive analytically in the thin-wall approx…
Doubly peaked induced stochastic gravitational wave background : Testing baryogenesis from primordial black holes
Nilanjandev Bhaumik, Anish Ghoshal, Marek Lewicki
Hawking evaporation of primordial black holes (PBHs) can facilitate the generation of matter-antimatter asymmetry. We focus on ultra-low mass PBHs that briefly dominate the univers…
Bubble dynamics in fluids with N-body simulations
Marek Lewicki, Ville Vaskonen, Hardi Veermäe
We present a new approach to studies of bubble dynamics in fluids. Relying on particle-based simulations, this method is general and suitable for cases where the commonly used perf…
Cosmology with the Laser Interferometer Space Antenna
Pierre Auclair, David Bacon, Tessa Baker +177
The Laser Interferometer Space Antenna (LISA) has two scientific objectives of cosmological focus: to probe the expansion rate of the universe, and to understand stochastic gravita…
Electroweak bubble wall expansion: gravitational waves and baryogenesis in Standard Model-like thermal plasma
Marek Lewicki, Marco Merchand, Mateusz Zych
Computing the properties of the bubble wall of a cosmological first order phase transition at electroweak scale is of paramount importance for the correct prediction of the baryon…
Impact of LIGO-Virgo black hole binaries on gravitational wave background searches
Marek Lewicki, Ville Vaskonen
We study the impact of the black hole binary population currently probed by LIGO-Virgo on future searches for the primordial gravitational wave background. We estimate the foregrou…
Escape from supercooling with or without bubbles: gravitational wave signatures
Marek Lewicki, Oriol Pujolàs, Ville Vaskonen
Quasi-conformal models are an appealing scenario that can offer naturally a strongly supercooled phase transition and a period of thermal inflation in the early Universe. A crucial…