Thermo Field Dynamics of strings with definite boundary conditions

Abstract

In this paper we review the construction of the thermal bosonic string and $D$-brane in the framework of the Thermo Field Dynamics (TFD). We briefly recall the well-known light-cone quantization of the bosonic string in the conformal gauge in flat space-time. Then we give a bird's eye view of the fundamental concepts of the TFD. Also, we present the thermalization of the bosonic string and the construction of the thermal D-brane boundary state. Finally, we show the calculation of the entropy of the thermal open string states with all boundary conditions and the entropy of the thermal D-brane state.

Invited review paper to "Progress in String Theory Research." 41 pages, Latex

References in corpus (5)

• Thermal $D$-Brane Boundary States from Green-Schwarz Superstrings
• Thermal D-brane boundary states from type IIB Green-Schwarz superstring in pp-wave background
• Nonequilibrium dynamics of strings in time-dependent plane wave backgrounds
• TFD Extension of Open String Field Theory
• Contributions to the Study of Thermal States of the Bosonic String in the TFD Formalism