Zobrazeno 1 - 10
of 221
pro vyhledávání: '"Gava E"'
Publikováno v:
Fortsch.Phys.55:781-786,2007
We study a class of exact supersymmetric solutions of type IIB Supergravity. They have an SO(4) x SU(2) x U(1) isometry and preserve generically 4 of the 32 supersymmetries of the theory. Asymptotically AdS_5 x S^5 solutions in this class are dual to
Externí odkaz:
http://arxiv.org/abs/hep-th/0701119
Publikováno v:
JHEP 0705:030,2007
We study a class of exact supersymmetric solutions of type IIB Supergravity. They have an SO(4) x SU(2) x U(1) isometry and preserve generically 4 of the 32 supersymmetries of the theory. Asymptotically AdS_5 x S^5 solutions in this class are dual to
Externí odkaz:
http://arxiv.org/abs/hep-th/0611065
Publikováno v:
JHEP 0507:036,2005
We study the tachyon and the RR field sourced by the $(m,n)$ ZZ D-branes in type 0 theories using three methods. We first use the mini-superspace approximation of the closed string wave functions of the tachyon and the RR scalar to probe these fields
Externí odkaz:
http://arxiv.org/abs/hep-th/0504042
We study the plane wave limit of $AdS_5\times S^5/Z_2$ which arises as the near horizon geometry of D3-branes at an orientifold 7-plane in type I' theory. We analyze string theory in the resulting plane wave background which contains open strings. We
Externí odkaz:
http://arxiv.org/abs/hep-th/0203249
Publikováno v:
Nucl.Phys. B626 (2002) 3-25
We study Little String Theories (LST) with ${\cal N}=(1,0)$ supersymmetry arising, in a suitable double scaling limit, from 5-branes in heterotic string theory or in the heterotic-like type II/$(-)^{F_L}\times {\rm shift}$. The limit in question, pre
Externí odkaz:
http://arxiv.org/abs/hep-th/0112200
Publikováno v:
JHEP 0103:035,2001
We discuss spectra of $AdS_3$ supergravities, arising in the near horizon geometry of D1/D5 systems in orbifolds/orientifolds of type IIB theory with 16 supercharges. These include models studied in a recent paper (hep-th/0012118), where the group ac
Externí odkaz:
http://arxiv.org/abs/hep-th/0102043
Publikováno v:
Nucl.Phys. B605 (2001) 17-63
We propose CFT descriptions of the D1/D5 system in a class of freely acting Z_2 orbifolds/orientifolds of type IIB theory, with sixteen unbroken supercharges. The CFTs describing D1/D5 systems involve N=(4,4) or N=(4,0) sigma models on $(R^3\times S^
Externí odkaz:
http://arxiv.org/abs/hep-th/0012118
Publikováno v:
Nucl.Phys.B569:183-208,2000
We study, using ADHM construction, instanton effects in an ${\CN}=2$ superconformal $Sp(N)$ gauge theory, arising as effective field theory on a system of $N$ D-3-branes near an orientifold 7-plane and 8 D-7-branes in type I' string theory. We work o
Externí odkaz:
http://arxiv.org/abs/hep-th/9908125
Publikováno v:
JHEP 9903:023,1999
We study ${\cal F}^4$-threshold corrections in an eight dimensional S-dual pair of string theories, as a prototype of dual string vacua with sixteen supercharges. We show that the orbifold CFT description of D-string instantons gives rise to a pertur
Externí odkaz:
http://arxiv.org/abs/hep-th/9902202
Publikováno v:
Nucl.Phys.B547:96-126,1999
We determine the spectrum of D-string bound states in various classes of generalized type I vacuum configurations with sixteen and eight supercharges. The precise matching of the BPS spectra confirms the duality between unconventional type IIB orient
Externí odkaz:
http://arxiv.org/abs/hep-th/9811013