منابع مشابه
On SUSY Restoration in Single-Superfield Inflationary Models of Supergravity
We study the conditions of restoring supersymmetry (SUSY) after inflation in the supergravity-based cosmological models with a single chiral superfield and a quartic stabilization term in the Kähler potential. Some new, explicit, and viable inflationary models satisfying those conditions are found. The inflaton’s scalar superpartner is dynamically stabilized during and after inflation. We also ...
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A new type of single-phase stand-alone induction generator using a three-phase induction machine and a single-phase voltage-source PWM inverter is introduced. The generator scheme is capable of producing constant load frequency with a very well regulated output voltage. A small lead acid battery and a single-phase full diode-bridge rectifier are used to feed the inverter. The inverter feeds one...
متن کاملNonthermal phase transitions after inflation.
At the rst stage of reheating after in ation, parametric resonance may rapidly transfer most of the energy of an in aton eld to the energy of other bosons. We show that quantum uctuations of scalar and vector elds produced at this stage are much greater than they would be in a state of thermal equilibrium. This leads to cosmological phase transitions of a new type, which may result in a copious...
متن کاملTesting and comparing tachyon inflation to single standard field inflation
We study the evolution of perturbations during the domination and decay of a massive particle species whose mass and decay rate are allowed to depend on the expectation value of a light scalar field. We specialize to the case where the light field is slow-rolling, showing that during a phase of inhomogeneous mass-domination and decay the isocurvature perturbation of the light field is converted...
متن کاملTachyon inflation : tests and comparison with single scalar field inflation
We compare the standard single scalar field inflationary predictions with those of an inflationary phase driven by a tachyon field. A slow-roll formalism is defined for tachyon inflation, and we derive the spectra of scalar and tensor perturbations as well as the consistency relations. At lowest order the predictions of standard and tachyon inflation are shown to be the same. Higher order devia...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2016
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2015.11.039