We establish the equivalence between the quantum evolution of spatially homogeneous oscillations of a scalar field and that of an analogous classical system with certain random initial condition. We argue that this observation can be used for numerical simulation of the Universe in the preheating epoch. We also explicitly demonstrate that the phenomenon of parametric resonance that leads to pre...

Purpose.Influence of preheating temperature and sodium silicate solute content in sand-sodium-silicate mixtures structured by SMS-process on their destruction work under knock loading action has been established. Methodology. Quartz sand brand 1K2O202, water, with specific gravity 1.42…1.44 g/cm3 modulus 2.8… 3.0 have used this work. Mixtures structuring realized microwave furnace frequency 2.4...

Abstract This paper delivers a detailed review of the influence material and process variables on microstructure, mechanical tribological characteristics functionally graded aluminum matrix composites (FGAMCs) produced by ex-situ centrifugal casting method from previous studies. Also, basic principle classification to produce FGAMCs are illustrated. The ceramic reinforcement particles classifie...

Fluctuations of scalar elds produced at the stage of preheating after in ation are so large that they can break supersymmetry much stronger than in ation itself. These uctuations may lead to symmetry restoration along at directions of the e ective potential even in the theories where the usual high temperature corrections are exponentially suppressed. Our results show that nonthermal phase tran...

We consider inhomogeneous preheating in a multi-field trapping model. The curvature perturbation is generated by inhomogeneous preheating which induces multi-field trapping at the enhanced symmetric point (ESP), and results in fluctuation in the number of e-foldings. Instead of considering simple reheating after preheating, we consider a scenario of shoulder inflation induced by the trapping. T...

The time course of change in thermosensitivity of SCK tumor cells in vivo was investigated following preheating at 43.5 degrees for 30 min. At varying times after the preheating with water bath, tumors were subjected to graded doses of second heating at 43.5 degrees in vivo, and cell survival was determined by using in vitro cloning method. Thermosensitivity of the tumor cells in vivo [duration...

Takashi Torii ‡ Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo 152, Japan (June 4, 2005) In higher-curvature inflation models (R + αnR ), we study a parametric preheating of a scalar field χ coupled non-minimally to a spacetime curvature R (ξRχ). In the case of R-inflation model, efficient preheating becomes possible for rather small values of ξ, i.e. |ξ|∼ several. Although...

We discuss toy models where supersymmetry is broken due to a nonvanishing time-varying vacuum expectation value of the inflaton field during preheating. We discuss the production of an inflatino, the superpartner of the inflaton, due to vacuum fluctuations and then we argue that they do not survive until nucleosynthesis and decay along with the inflaton to produce a thermal bath after preheatin...