Vol. 53, No. 4
October 1999
pp. 685-700

Dirac current in expanding spacetime

N G SARKAR ^a ,S BISWAS ^a;b and A SHAW ^a

^a Department of Physics, University of Kalyani, West Bengal 741 235, India
^b Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Ganeshkhind, Pune 411 007, India
Email: sbiswas@klyuniv.ernet.in; amita@klyuniv.ernet.in
MS received 18 August 1998; revised 19 July 1999

Abstract.

We study the behaviour of Dirac current in expanding spacetime with Schrödinger and de Sitter form for the evolution of the scale-factor. The study is made to understand the particle-antiparticle rotation and the evolution of quantum vacuum leading to particle production in such spacetime.

Keywords. Particle production; Dirac current; expanding spacetime.

PACS Nos 03.65 Sq; 04.62; 98.80 Hw

| back | | View pdf file |