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Aspects of reheating in first-order inflation
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Watkins, Richard Widrow, Lawrence M. |
| Copyright Year | 1991 |
| Description | Studied here is reheating in theories where inflation is completed by a first-order phase transition. In the scenarios, the Universe decays from its false vacuum state by bubble nucleation. In the first stage of reheating, vacuum energy is converted into kinetic energy for the bubble walls. To help understand this phase, researchers derive a simple expression for the equation of state of a universe filled with expanding bubbles. Eventually, the bubble walls collide. Researchers present numerical simulations of two-bubble collisions clarifying and extending previous work by Hawking, Moss, and Stewart. The researchers' results indicate that wall energy is efficiently converted into coherent scalar waves. Also discussed is particle production due to quantum effects. These effects lead to the decay of the coherent scalar waves. They also lead to direct particle production during bubble-wall collisions. Researchers calculate particle production for colliding walls in both sine-Gordon and theta (4) theories and show that it is far more efficient in the theta (4) case. The relevance of this work for recently proposed models of first order inflation is discussed. |
| File Size | 832840 |
| Page Count | 13 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19910019794 |
| Archival Resource Key | ark:/13960/t5hb41p5k |
| Language | English |
| Publisher Date | 1991-06-01 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Nucleation Particle Production Universe Bubbles Gas-liquid Interactions Vacuum Equations of State Heating Collisions Cosmology Scalars Kinetic Energy Walls Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
