Zobrazeno 1 - 10
of 136
pro vyhledávání: '"Rudnei O, Ramos"'
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 8, Pp 1-22 (2022)
Abstract We analyze the possible quantum phase transition patterns occurring within the O(N) × ℤ2 scalar multi-field model at vanishing temperatures in (1 + 1)-dimensions. The physical masses associated with the two coupled scalar sectors are eval
Externí odkaz:
https://doaj.org/article/436a0d5f58ee47a5b5702b997ca303e6
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 5, Pp 1-10 (2021)
Abstract We consider thermal, trapped and chromo-natural inflation in light of the swampland criteria and the Trans-Planckian Censorship Conjecture (TCC). Since thermal inflation occurs at energies low compared to those of Grand Unification, it is co
Externí odkaz:
https://doaj.org/article/2f8746d097ef441a90d4ef86c9203f7d
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 8, Pp 1-13 (2020)
Abstract The de Sitter constraint on the space of effective scalar field theories consistent with superstring theory provides a lower bound on the slope of the potential of a scalar field which dominates the evolution of the Universe, e.g., a hypothe
Externí odkaz:
https://doaj.org/article/2021966d098a457d97ca3bf5cb036457
Publikováno v:
Universe, Vol 9, Iss 3, p 124 (2023)
Warm inflation, its different particle physics model implementations, and the implications of dissipative particle production for its cosmology are reviewed. First, we briefly present the background dynamics of warm inflation and contrast it with the
Externí odkaz:
https://doaj.org/article/b4a1542e2fec4111888ccf0f73f7c4dc
Autor:
Suratna Das, Rudnei O. Ramos
Publikováno v:
Universe, Vol 9, Iss 2, p 76 (2023)
The next generation of cosmological observations are expected to improve the measurements of several quantities connected to the primordial inflation in the early Universe. These quantities include, for example, improved measurements for the spectral
Externí odkaz:
https://doaj.org/article/2febfc551bac411a9179e2161bd50ace
Publikováno v:
Physics Letters B, Vol 813, Iss , Pp 136055- (2021)
We present the first quantum field theory model of inflation that is renormalizable in the matter sector, with a super-Hubble inflaton mass and sub-Planckian field excursions, which is thus technically natural and consistent with a high-energy comple
Externí odkaz:
https://doaj.org/article/2f3213d80e80472c901f0e84def99238
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 2, Pp 1-22 (2018)
Abstract We show that, in warm inflation, the nearly constant Hubble rate and temperature lead to an adiabatic evolution of the number density of particles interacting with the thermal bath, even if thermal equilibrium cannot be maintained. In this c
Externí odkaz:
https://doaj.org/article/c6d5bb0589e44350b61a9ae9ed9343fb
Autor:
Van Sérgio Alves, E.C. Marino, Leandro O. Nascimento, J.F. Medeiros Neto, Rodrigo F. Ozela, Rudnei O. Ramos
Publikováno v:
Physics Letters B, Vol 797, Iss , Pp - (2019)
Quantum electrodynamics (QED) of electrons confined in a plane and that yet can undergo interactions mediated by an unconstrained photon has been described by the so-called pseudo-QED (PQED), the (2+1)-dimensional version of the equivalent dimensiona
Externí odkaz:
https://doaj.org/article/f93f0aaa138041dcb8b6348a8c749d1a
Publikováno v:
Physical Review
The phase transition patterns displayed by a model of two coupled complex scalar fields are studied at finite temperature and chemical potential. Possible phenomena like symmetry persistence and inverse symmetry breaking at high temperatures are anal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::08a6381ee10664146c2af07f5883c155
http://repo.scoap3.org/api
http://repo.scoap3.org/api
Publikováno v:
Physical Review D. 106
The effective approach in Loop Quantum Cosmology (LQC) has provided means to obtain predictions for observable quantities in LQC models. While an effective dynamics in LQC has been extensively considered in different scenarios, a robust demonstration
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6cedf0865442262275d0e3117f0fdbd
https://doi.org/10.1103/physrevd.106.043518
https://doi.org/10.1103/physrevd.106.043518