اکبر جهان

We address the bosonic string pair creation in a system of parallel Dp–Dp′ (p < p′) branes by applying the path integral formalism. We drive the string pair creation rate by cal- culating the one-loop vacuum amplitude of the setup in the presence of the background electric field defined over the Dp′-brane. It is pointed out that just the components of the electric field defined over the p spatial directions (the common directions along which the both D-branes are extended) give rise to the pair creation.