Double-layered vacuum bubbles and cosmological phase transitions
arXiv:2509.00758 · doi:10.1140/epjc/s10052-026-15512-7
Abstract
We investigate the evolution and formation of double-layered vacuum bubbles during cosmological phase transitions with multiple vacua. We employ lattice simulations to show that flyover transitions can produce double-layered vacuum bubbles by overcoming successive potential barriers, thereby suggesting a novel bubble vacuum configuration in cosmological phase transitions. The evolution of these bubbles, including wall acceleration, collisions, and the formation of trapped regions, is explored through numerical simulations. Our results show that the dynamics of double-layered bubbles differ significantly from standard single-wall bubbles, with implications for cosmological observables such as gravitational wave production and baryogenesis.
6 pages, 6 figures
References in corpus (24)
- Electroweak baryogenesis
- Gravitational Wave Production by Collisions: More Bubbles
- Complex Singlet Extension of the Standard Model
- General Properties of the Gravitational Wave Spectrum from Phase Transitions
- Gravitational wave generation from bubble collisions in first-order phase transitions: an analytic approach
- Gravitational wave energy budget in strongly supercooled phase transitions
- Gravitational waves from vacuum first-order phase transitions: from the envelope to the lattice
- Gravitational waves from vacuum first order phase transitions II: from thin to thick walls
- Gravitational waves from bubble dynamics: Beyond the Envelope
- FindBounce: package for multi-field bounce actions
- Gravitational wave spectra from strongly supercooled phase transitions
- How to Run Through Walls: Dynamics of Bubble and Soliton Collisions
- A New Semiclassical Picture of Vacuum Decay
- A New Mechanism for Bubble Nucleation: Classical Transitions
- Gravitational Waves, baryon asymmetry of the universe and electric dipole moment in the CP-violating NMSSM
- Relativistic bubble collisions -- a closer look
- Exotic Gravitational Wave Signatures from Simultaneous Phase Transitions
- Real-time dynamics of false vacuum decay
- Probing multi-step electroweak phase transition with multi-peaked primordial gravitational waves spectra
- Flyover vacuum decay
- Gravitational Waves from Axion Monodromy
- Bubble velocities and oscillon precursors in first-order phase transitions
- Occurrence of semiclassical vacuum decay
- Gravitational waves from vacuum bubbles: Ultraviolet dependence on wall thickness