Fractal initial conditions and natural parameter values in hybrid inflation
نویسندگان
چکیده
منابع مشابه
Realizations of Hybrid Inflation in Supergravity with natural initial conditions
We present viable F-term realizations of the hybrid inflationary scenario in the context of supergravity addressing at the same time the well-known problems of the initial conditions and of the adequate suppression of the inflaton mass. An essential role in our construction is played by “decoupled” superheavy fields without superpotential acquiring large vevs due to D-terms associated with “ano...
متن کاملInitial conditions for smooth hybrid inflation.
We perform a numerical investigation of the field evolution in the smooth hybrid inflationary model. We find that for almost all the examined initial values we do get an adequate amount of inflation. Our results show that the model is ”natural” and satisfactory.
متن کاملInitial conditions for inflation
Free scalar fields in de Sitter space have a one-parameter family of states invariant under the de Sitter group, including the standard thermal vacuum. We show that, except for the thermal vacuum, these states are unphysical when gravitational interactions are included. We apply these observations to the quantum state of the inflaton, and find that at best, dramatic fine tuning is required for ...
متن کاملFine-tuning of the initial conditions for hybrid inflation
One of the most attractive features of hybrid inflation @1# is that it can take place for values of the inflation field below the Planck scale @2#. This permits the construction of realistic field theoretical models without the need of a description of quantum gravity. Several such models have been proposed within the context of supersymmetry @2–9#. Inflation requires the presence of an almost ...
متن کاملInitial Conditions, Inflation, and Fluctuations
A s you know, four main bodies of evidence affirm the big bang: the dark sky, Hubble expansion, element abundances, and cosmic microwave background radiation (CMBR). Parts 1-4 of this series briefly examined these topics. [1-4] Here we say a few words about the window the CMBR offers into the very early universe, including a brief but crucial epoch of " inflation. " Recall that the CMBR was fir...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2009
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.80.123534