Article

# Fermionic Backgrounds and Condensation of Supergravity Fields in IIB Matrix Model

Physical review D: Particles and fields 03/2005; DOI: 10.1103/PhysRevD.72.066001

Source: arXiv

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**ABSTRACT:**We investigate the vertex operators of the supergravity multiplet in IIB (IKKT) matrix model by calculating the disk amplitudes, exploiting the technique of conformal field theory. The vertex operators of IIB matrix model are given as the coupling of a closed string and the open strings which are introduced by the existence of D(−1)-branes. We consider the most generic couplings which involve both the bosonic and fermionic open strings. Our results are consistent with the previous results based on supersymmetry. We thus confirm the structure of the IIB matrix model vertex operators from the first principle.Nuclear Physics B 01/2009; · 4.33 Impact Factor - [Show abstract] [Hide abstract]

**ABSTRACT:**We construct wave functions and vertex operators in the type IIB matrix model by using a supersymmetric Wilson line operator. It is shown that wave functions can be intepreted as overlaps of the D-instanton boundary states with the closed string massless states. We then calculate the one-loop effective action for N D-instantons under the supergravity backgrounds by integrating out one D-instanton with an appropriate wave function.Progress of Theoretical Physics Supplement 01/2006; 164:109-117. · 1.25 Impact Factor -
##### Article: Little typeIIB matrix model

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**ABSTRACT:**We study the zero-dimensional reduced model of D=6 pure super Yang-Mills theory and argue that the large N limit describes the (2,0) Little String Theory. The one-loop effective action shows that the force exerted between two diagonal blocks of matrices behaves as 1/r4, implying a six-dimensional spacetime. We also observe that it is due to nongravitational interactions. We construct wave functions and vertex operators which realize the D=6, (2,0) tensor representation. We also comment on other little analogues of the IIB matrix model and Matrix Theory with less supercharges.Physical review D: Particles and fields 01/2006; 74(4).

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