The processes of particle creation are essential for understanding the

preheating of the Universe after its inflationary epoch. An analytical

formula, allowing an account for the particle creation process from

due to a scalar time-depending field was derived.

Our recent work is dedicated on providing a more presice numerical

account for the particle creation processes in baryogenesis models.

Dolgov A., Kirilova D., Baryon Charge Condensate and Baryogenesis,

J. Moscow Phys. Soc. 1, p.217-227, 1991.

Chizhov M., Kirilova D., Large Scale Periodicity of the Universe

and Baryogenesis, Comm. JINR E2-94-258, Dubna, p.1-7, 1994.

Chizhov M., Kirilova D., Non-GUT Baryogenesis and Large

Scale Periodicity of the Universe, Proc.Scientific Session

Dedicated to 100-th Anniversary of the Sofia University Astronomical

Observatory, Sofia, 3-4 October, 1994, Naturela publ., Sofia,

1996, p. 114.

Chizhov M., Kirilova D., Generation of 128 Mpc Periodicity of the Universe

in the Scalar Field Condensate Baryogenesis Scenario, Astronomical &

Astrophysical Transections, 1996,v.10, p.69-75.

Kirilova D., Chizhov M., Non-GUT Baryogenesis and Large Scale

Structure of the Universe, astro-ph/9908319, MNRAS 314, p.256-262, 2000.

Dolgov A., Kirilova D., Production of particles by a variable scalar field,

Jadr. Phys. 51, p.273, 1990; Sov. J. Nucl. Phys. 51, p.172-177, 1990.