When did vacuum energy of the Universe become cosmological constant?
| dc.creator | Burdyuzha, V. | |
| dc.date | 2007-12-29 | |
| dc.date.accessioned | 2026-07-07T08:51:52Z | |
| dc.date.available | 2026-07-07T08:51:52Z | |
| dc.description | A quark-gluon phase transition in the Universe is researched after which vacuum (dark) energy has hardened and become cosmological constant. Before this a vacuum component of the Universe was changing by jumps during phase transitions since vacuum condensates of quantum fields carried a negative contribution in its positive density energy. This quintessence period of the Universe life took place during the first parts of a second when our Universe was losing high symmetry. Using Zel'dovich's formula the modern value of vacuum energy is also calculated. It is shown that a quantum chromodynamical vacuum which is characterized by pseudogoldstone bosons existed definitely when temperature of the Universe was T~150 MeV. Therefore there is a large probability that dark energy is vacuum energy. | |
| dc.description | 3 pages. submitted to Phys. Letters | |
| dc.identifier | https://arxiv.org/abs/0801.0047 | |
| dc.identifier | http://arxiv.org/abs/0801.0047 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/145088 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | When did vacuum energy of the Universe become cosmological constant? | |
| dc.type | text |