TFD Approach to Bosonic Strings and $D_{P}$-branes

M. C. B. Abdalla; A. L. Gadelha; I. V. Vancea

doi:10.1142/S0217751X03015556

paper

TFD Approach to Bosonic Strings and $D_{P}$ -branes

arXiv:hep-th/0301249 · doi:10.1142/S0217751X03015556

Abstract

In this work we explain the construction of the thermal vacuum for the bosonic string, as well that of the thermal boundary state interpreted as a $D_{p}$ -brane at finite temperature. In both case we calculate the respective entropy using the entropy operator of the Thermo Field Dynamics Theory. We show that the contribution of the thermal string entropy is explicitly present in the $D_{p}$ -brane entropy. Furthermore, we show that the Thermo Field approach is suitable to introduce temperature in boundary states.

6 pages, revtex, typos are corrected. Prepared for the Second Londrina Winter School-Mathematical Methods in Physics, August 25-30, 2002, Londrina-Pr, Brazil. To appear in a special issue of IJMPA

TFD Approach to Bosonic Strings and DP​-branes

Abstract

TFD Approach to Bosonic Strings and $D_{P}$ -branes