A.L. Gadelha

Bosonic D-branes at finite temperature with an external field

Bosonic boundary states at finite temperature are constructed as solutions of boundary conditions at

Superstring in a pp-wave background at finite temperature. TFD approach

T\ensuremath{\ne}0

General unitary SU(1,1) TFD formulation

for bosonic open strings with a constant gauge field

Bosonic Dp-branes at finite temperature in TFD approach

{F}_{\mathrm{ab}}

Entanglement and entropy operator for strings in pp-wave time dependent background

coupled to the boundary. The construction is done in the framework of thermo field dynamics where a thermal Bogoliubov transformation maps states and operators to finite temperature. Boundary states are given in terms of states from the direct product space between the Fock space of the closed string and another identical copy of it. By analogy with zero temperature, the boundary states have the interpretation of

On (b,c)-system at finite temperature in thermo field approach

\mathrm{D}p

On the entropy operator for the general SU(1, 1) TFD formulation

-branes at finite temperature. The boundary conditions admit two different solutions. The entropy of the closed string in a

PP-wave light-cone free string field theory at finite temperature

\mathrm{D}p

Perspectives of TFD on String Theory

-brane state is computed and analyzed. It is interpreted as the entropy of the

Duality between coordinates and Dirac field

\mathrm{D}p