Saved in:
| Main Authors: | , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2602.04586 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866917247891537920 |
|---|---|
| author | Wei, Dongdong Guo, Zong-Kuan |
| author_facet | Wei, Dongdong Guo, Zong-Kuan |
| contents | We study bubble-wall dynamics in cosmological first-order phase transitions in a two-scalar-field model, where the wall is formed by $ϕ$ and an additional real scalar $s$ couples through a portal interaction. We evolve the coupled classical field equations on the lattice and demonstrate that for an initial Bose--Einstein distribution of $s$ fluctuations at the nucleation temperature $T_n$, the resulting patchy background intermittently modulates the local driving pressure on the wall. The wall therefore undergoes alternating episodes of acceleration and deceleration and approaches a quasi-stationary propagation regime with a smaller time-averaged speed than in the decoupled limit. We further identify three familiar propagation profiles -- deflagration, detonation, and hybrid -- distinguished by where the dynamical $s$-sector energy density is concentrated relative to the wall. These effects can impact gravitational wave and baryogenesis predictions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_04586 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Fluctuation-Induced Friction in Bubble-Wall Dynamics of Cosmological First-Order Phase Transitions Wei, Dongdong Guo, Zong-Kuan High Energy Physics - Phenomenology We study bubble-wall dynamics in cosmological first-order phase transitions in a two-scalar-field model, where the wall is formed by $ϕ$ and an additional real scalar $s$ couples through a portal interaction. We evolve the coupled classical field equations on the lattice and demonstrate that for an initial Bose--Einstein distribution of $s$ fluctuations at the nucleation temperature $T_n$, the resulting patchy background intermittently modulates the local driving pressure on the wall. The wall therefore undergoes alternating episodes of acceleration and deceleration and approaches a quasi-stationary propagation regime with a smaller time-averaged speed than in the decoupled limit. We further identify three familiar propagation profiles -- deflagration, detonation, and hybrid -- distinguished by where the dynamical $s$-sector energy density is concentrated relative to the wall. These effects can impact gravitational wave and baryogenesis predictions. |
| title | Fluctuation-Induced Friction in Bubble-Wall Dynamics of Cosmological First-Order Phase Transitions |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2602.04586 |