منابع مشابه
Minimal gauge inflation
We consider a gauge inflation model in the simplest orbifold M4 × S/Z2 with the minimal non-Abelian SU(2) hidden sector gauge symmetry. The inflaton potential is fully radiatively generated solely by gauge self-interactions. Following the virtue of gauge inflation idea, the inflaton, a part of the five dimensional gauge boson, is automatically protected by the gauge symmetry and its potential i...
متن کاملInflation without slow roll
We draw attention to the possibility that inflation (i.e. accelerated expansion) might continue after the end of slow roll, during a period of fast oscillations of the inflaton field φ. This phenomenon takes place when a mild non-convexity inequality is satisfied by the potential V (φ). The presence of such a period of φ-oscillation-driven inflation can substantially modify reheating scenarios....
متن کاملNon-abelian discrete gauge symmetries and inflation
Obtaining a potential flat enough to provide slow roll inflation is often difficult when gravitational effects are included. Nonabelian discrete gauge symmetries can guarantee the flatness of the inflaton potential in this case, and also provide special field values where inflation can end. [email protected] Address from August 1999. [email protected] Address from August 1999.
متن کاملChosen-Ciphertext Security without Redundancy
We propose asymmetric encryption schemes for which all ciphertexts are valid (which means here “reachable”: the encryption function is not only a probabilistic injection, but also a surjection). We thus introduce the Full-Domain Permutation encryption scheme which uses a random permutation. This is the first IND-CCA cryptosystem based on any trapdoor one-way permutation without redundancy, and ...
متن کاملMagnetogenesis, Variation of Gauge Couplings and Inflation
The interplay among the possible variation of gauge coupling and the inflationary dynamics is investigated in a simplified toy model. Depending upon various parameters (scalar mass, curvature scale at the end of inflation and at the onset of the radiation epoch), the two-point function of the magnetic inhomogeneities grows during the de Sitter stage of expansion and, consequently, large scale m...
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: Journal of Cosmology and Astroparticle Physics
سال: 2020
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2020/04/040