Thermal Partition Functions for S-branes
نویسنده
چکیده
We calculate the thermal partition functions of open strings on the S-brane backgrounds (the bouncing or rolling tachyon backgrounds) both in the bosonic and superstring cases. According to [9], we consider the discretized temperatures compatible with the pure imaginary periodicity of tachyon profiles. The “effective Hagedorn divergence” is shown to appear no matter how low temperature is chosen (including zerotemperature). This feature is likely to be consistent with the large rate of open string pair production discussed in [5] and also emission of closed string massive modes [8]. We also discuss the possibility to remove the divergence by considering the space-like linear dilaton backgrounds as in [27].
منابع مشابه
Thermal D-Brane Boundary States from Green-Schwarz Superstrings
In this paper we thermalize the type II superstrings in the GS formulation by applying the TFD formalism. The thermal boundary conditions on the thermal Hilbert space are obtained from the BPS D-brane boundary conditions at zero temperature. We show that thermal boundary states can be obtained by thermalization from the BPS D-branes at zero temperature. These new states can be interpreted as th...
متن کاملBranes in Super–ads Backgrounds and Superconformal Theories
We demonstrate how actions for interacting superconformal field theories in (p+1)-dimensions arise as a result of gauge fixing worldvolume diffeomorphisms and fermionic κ-symmetry in actions for super-p-branes propagating in superbackgrounds of AdSp+2×S geometry. The method of nonlinear realizations and coset spaces is used for getting an explicit form of supervielbeins and superconnections of ...
متن کاملLoop Corrected D-branes Stability Conditions
In type-II string theory compactifications on Calabi-Yau manifolds, topological string theory partition functions give a class of exact F-terms in the 4d effective action. We point out that in the background of constant self-dual field strength, these terms deform the central charges for D-branes wrapping Calabi-Yau manifold to include string loop corrections. We study the corresponding loop co...
متن کاملLoop Corrected D-brane Stability Conditions
In type-II string theory compactifications on Calabi-Yau manifolds, topological string theory partition functions give a class of exact F-terms in the four dimensional effective action. We point out that in the background of constant self-dual field strength, these terms deform the central charges for D-branes wrapping Calabi-Yau manifold to include string loop corrections. We study the corresp...
متن کامل2d SCFTs from M2-branes
We consider the low-energy limit of the two-dimensional theory on k M2-branes suspended between a straight M5-brane and a curved M5-brane. We argue that it is described by an N=(2, 2) supersymmetric gauge theory with no matter fields but with a non-trivial twisted superpotential, and also by an N=(2, 2) supersymmetric Landau-Ginzburg model, such that the (twisted) superpotentials are determined...
متن کامل