Effect of density fluctuations on gravitational wave production in first-order phase transitions

Abstract

We study the effect of density perturbations on the process of first-order phase transitions and gravitational wave production in the early Universe. We are mainly interested in how the distribution of nucleated bubbles is affected by fluctuations in the local temperature. We find that large-scale density fluctuations ($H_{\ast }<k_{\ast }<\beta$) result in a larger effective bubble size at the time of collision, enhancing the produced amplitude of gravitational waves. The amplitude of the density fluctuations necessary for this enhancement is ${\mathcal{P}}_{\zeta }(k_{\ast })\gtrsim (\beta /H_{\ast }{)}^{-2}$, and therefore the gravitational wave signal from first-order phase transitions with relatively large $\beta /H_{\ast }$ can be significantly enhanced by this mechanism even for fluctuations with moderate amplitudes.

arXiv comment22 pages, 14 figures, published version

References in corpus (42)

• Observation of Gravitational Waves from a Binary Black Hole Merger
• TianQin: a space-borne gravitational wave detector
• Laser Interferometer Space Antenna
• Possibility of Direct Measurement of the Acceleration of the Universe Using 0.1 Hz Band Laser Interferometer Gravitational Wave Antenna in Space
• Science with the space-based interferometer eLISA. II: Gravitational waves from cosmological phase transitions
• Progress in Electroweak Baryogenesis
• Electroweak baryogenesis
• Primordial Black Holes - Perspectives in Gravitational Wave Astronomy -
• Gravitational Wave Spectrum Induced by Primordial Scalar Perturbations
• Detecting gravitational waves from cosmological phase transitions with LISA: an update
• The cosmological gravitational wave background from primordial density perturbations
• Recent Progress in Baryogenesis
• Energy Budget of Cosmological First-order Phase Transitions
• Gravitational Wave Production by Collisions: More Bubbles
• Gravitational waves from the sound of a first order phase transition
• Numerical simulations of acoustically generated gravitational waves at a first order phase transition
• Gravitational Radiation from Colliding Vacuum Bubbles: Envelope Approximation to Many-Bubble Collisions
• Electroweak Baryon Number Non-Conservation in the Early Universe and in High Energy Collisions
• Shape of the acoustic gravitational wave power spectrum from a first order phase transition
• Prospects for Fundamental Physics with LISA
• AEDGE: Atomic Experiment for Dark Matter and Gravity Exploration in Space
• AION: An Atom Interferometer Observatory and Network
• Gravitational waves from bubble collisions: analytic derivation
• Improved constraints on the primordial power spectrum at small scales from ultracompact minihalos
• Sound shell model for acoustic gravitational wave production at a first-order phase transition in the early Universe
• Gauge field production in SUGRA inflation: local non-Gaussianity and primordial black holes
• Gravitational waves from first-order cosmological phase transitions: lifetime of the sound wave source
• Vorticity, kinetic energy, and suppressed gravitational wave production in strong first order phase transitions
• Gravitational waves from first order cosmological phase transitions in the Sound Shell Model
• The Gravitational-Wave Physics
• Phase transitions in the early universe
• The Gravitational Universe
• Model-independent energy budget of cosmological first-order phase transitions
• Gravitational waves from bubble dynamics: Beyond the Envelope
• Anisotropies and non-Gaussianity of the Cosmological Gravitational Wave Background
• Gravitational radiation from a bulk flow model
• The Gravitational-Wave Physics II: Progress
• Model-independent energy budget for LISA
• A hybrid simulation of gravitational wave production in first-order phase transitions
• Deformation of the gravitational wave spectrum by density perturbations
• Unveiling the Gravitational Universe at μ-Hz Frequencies
• Hydrodynamic fluctuations from a weakly coupled scalar field

Cited by in corpus (21)

• Higgsless simulations of cosmological phase transitions and gravitational waves
• Did we hear the sound of the Universe boiling? Analysis using the full fluid velocity profiles and NANOGrav 15-year data
• Domain walls seeding the electroweak phase transition
• Constraining first-order phase transitions with curvature perturbations
• Complete analysis of the background and anisotropies of scalar-induced gravitational waves: primordial non-Gaussianity $f_{\mathrm{NL}}$ and $g_{\mathrm{NL}}$ considered
• Anisotropy of phase transition gravitational wave and its implication for primordial seeds of the Universe
• Anisotropies in Scalar-Induced Gravitational-Wave Background from Inflaton-Curvaton Mixed Scenario with Sound Speed Resonance
• Sound velocity effects on the phase transition gravitational wave spectrum in the sound shell model
• Sensitivity to Dark Sector Scales from Gravitational Wave Signatures
• Droplet collapse during strongly supercooled transitions
• Electroweak Phase Transition with a Double Well Done Doubly Well
• Large Primordial Fluctuations in Gravitational Waves from Phase Transitions
• Gravitational waves from first-order phase transitions: from weak to strong
• Maximal temperature of strongly-coupled dark sectors
• Evolution of coupled scalar perturbations through smooth reheating. I. Dissipative regime
• QCD Axion Strings or Seeds?
• Measuring the anisotropies in astrophysical and cosmological gravitational-wave backgrounds with Taiji and LISA networks
• Gravitational waves from first-order phase transitions in Majoron models of neutrino mass
• Inverse bubbles from broken supersymmetry
• Can asteroid-mass PBHDM be compatible with catalyzed phase transition interpretation of PTA?
• DeepSSM: an emulator of gravitational wave spectra from sound waves during cosmological first-order phase transitions