dorsal/arxiv
View SchemaNatural Entropy Production in an Inflationary Model for a Polarized Vacuum
| Authors | Marcelo Samuel Berman, Murari M. Som |
|---|---|
| Categories | |
| ArXiv ID | physics/0701070 |
| URL | https://arxiv.org/abs/physics/0701070 |
| DOI | 10.1007/s10509-007-9514-8 |
| Journal | Astrophys.SpaceSci.310:277-279,2007 |
Abstract
Though entropy production is forbidden in standard FRW Cosmology, Berman and Som presented a simple inflationary model where entropy production by bulk viscosity, during standard inflation without ad hoc pressure terms can be accommodated with Robertson-Walker's metric, so the requirement that the early Universe be anisotropic is not essential in order to have entropy growth during inflationary phase, as we show. Entropy also grows due to shear viscosity, for the anisotropic case. The intrinsically inflationary metric that we propose can be thought of as defining a polarized vacuum, and leads directly to the desired effects without the need of introducing extra pressure terms.
{
"annotation_id": "bedd212e-3907-4e5c-bbc9-e2dbb8f47524",
"date_created": "2026-03-02T18:01:18.016000Z",
"date_modified": "2026-03-02T18:01:18.016000Z",
"file_hash": "7aec4b498c0afe17e945275e5ca89f820670a0db748c941a357be31f14c282b2",
"private": false,
"record": {
"abstract": "Though entropy production is forbidden in standard FRW Cosmology, Berman and\nSom presented a simple inflationary model where entropy production by bulk\nviscosity, during standard inflation without ad hoc pressure terms can be\naccommodated with Robertson-Walker\u0027s metric, so the requirement that the early\nUniverse be anisotropic is not essential in order to have entropy growth during\ninflationary phase, as we show. Entropy also grows due to shear viscosity, for\nthe anisotropic case. The intrinsically inflationary metric that we propose can\nbe thought of as defining a polarized vacuum, and leads directly to the desired\neffects without the need of introducing extra pressure terms.",
"arxiv_id": "physics/0701070",
"authors": [
"Marcelo Samuel Berman",
"Murari M. Som"
],
"categories": [
"physics.gen-ph",
"physics.class-ph"
],
"doi": "10.1007/s10509-007-9514-8",
"journal_ref": "Astrophys.SpaceSci.310:277-279,2007",
"title": "Natural Entropy Production in an Inflationary Model for a Polarized Vacuum",
"url": "https://arxiv.org/abs/physics/0701070"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "d720c69c-90cf-457d-a791-6dae3ec7cf20",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}