منابع مشابه
The automorphic NS5-brane
Understanding the implications of SL(2,Z) S-duality on the hypermultiplet moduli space of type II string theories has led to much progress recently in uncovering D-instanton contributions. In this note, we suggest that the extended duality group SL(3,Z), which includes both S-duality and Ehlers symmetry, potentially determines the contributions of NS5-branes. We support this claim by automorphi...
متن کاملThe Automorphic Ns5-brane (2.0)
Understanding the implications of SL(2,Z) S-duality for the hypermultiplet moduli space of type II string theories has led to much progress recently in uncovering D-instanton contributions. In this work, we suggest that the extended duality group SL(3,Z), which includes both S-duality and Ehlers symmetry, determines the contributions of D5 and NS5-branes. We support this claim by automorphizing...
متن کاملComments on the IIA NS5-brane
We study N coincident IIA NS5-branes at large N using supergravity. We show that the absorption cross section for gravitons in this background does not vanish at zero string coupling for energies larger than ms √ N (ms is the string scale). Using a holographic description of the intrinsic theory of the IIA NS5-branes, we find an expression for the two point function of the stress energy tensor,...
متن کاملThermodynamics of the Near-Extremal NS5-brane
We consider the thermodynamics of the near-extremal NS5-brane in type IIA string theory. The central tool we use is to map phases of six-dimensional Kaluza-Klein black holes to phases of near-extremal M5-branes with a transverse circle in eleven-dimensional supergravity. By S-duality these phases correspond to phases of the near-extremal type IIA NS5-brane. One of our main results is that in th...
متن کاملNon-BPS D-brane Near NS5-branes
We use tachyon field theory effective action to study the dynamics of a non-BPS Dp-brane propagating in the vicinity of k NS5-branes. For the time dependent tachyon condensation we will concentrate on the case of the large tachyon and the case when a non-BPS D-brane is close to NS5-branes. For spatial dependent tachyon condensation we will argue that the problem reduces to the study of the moti...
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ژورنال
عنوان ژورنال: Communications in Number Theory and Physics
سال: 2009
ISSN: 1931-4523,1931-4531
DOI: 10.4310/cntp.2009.v3.n4.a5