D Branes in String Theory, I

Vecchia, P. Di; Liccardo, Antonella

doi:10.1007/978-94-011-4303-5_1

Cited by 85 publications

(137 citation statements)

References 12 publications

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“…By saturating the boundary state |B with the massless closed string states of the various sectors, one can determine which are the fields that couple to the fractional brane. In particular, following the procedure found in [22] and reviewed in [21], one can find that in the untwisted sectors the fractional D3-brane emits only the graviton h µν 2 and the 4-form potential C (4) . The couplings of these fields with the boundary state are explicitly given by [15] …”

Section: Jhep02(2001)014mentioning

confidence: 91%

“…By making the modular transformation s → 1/s, one can translate the one-loop open string amplitude (2.6) into a tree-level closed string exchange diagram and, after factorization, one can obtain the boundary state |B associated to the fractional brane [19,20] (for a review of the boundary state formalism and its applications see, for example, [21]). The boundary state represents the source for the closed strings emitted by the brane and in this case it has four different components which correspond to the (usual) NS-NS and R-R untwisted sectors and to the NS-NS and R-R twisted sectors.…”

Section: Jhep02(2001)014mentioning

confidence: 99%

See 1 more Smart Citation

Fractional D-branes and their gauge duals

Bertolini¹,

Vecchia²,

Marotta³

et al. 2001

J. High Energy Phys.

121

289

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We study the classical geometry associated to fractional D3-branes of type IIB string theory on IR 4 /Z 2 which provide the gravitational dual for N = 2 super Yang-Mills theory in four dimensions. As one can expect from the lack of conformal invariance on the gauge theory side, the gravitational background displays a repulson-like singularity. It turns out however, that such singularity can be excised by an enhançon mechanism. The complete knowledge of the classical supergravity solution allows us to identify the coupling constant of the dual gauge theory in terms of the string parameters and to find a logarithmic running that is governed precisely by the β function of the N = 2 super Yang-Mills theory. 1 Work partially supported by the European Commission RTN programme HPRN-CT-2000-00131 and by MURST.Contents 1 Introduction 1 2 The geometry of fractional D3-branes 2 3 The enhançon and the dual gauge theory 10

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Section: Jhep02(2001)014mentioning

confidence: 91%

Section: Jhep02(2001)014mentioning

confidence: 99%

Fractional D-branes and their gauge duals

Bertolini¹,

Vecchia²,

Marotta³

et al. 2001

J. High Energy Phys.

121

289

View full text Add to dashboard Cite

show abstract

“…All D-branes vibrate in the noncompact space according to the same profile f i (v). From the WCFT point of view these D-branes can be described by using the boundary state formalism (see [31,32] for a review), as discussed in [33][34][35]. In [20] this approach was used to show that the boundary state |B f i contains the information necessary to reconstruct the 2-charge solutions discussed in [36,37] (once they are rewritten in the appropriate duality frame).…”

Section: Mixed Disk Amplitudes Revisitedmentioning

confidence: 99%

“…Let us conclude the discussion of the 4D base by noticing that the (linearized) ψ takes a very simple form 32) where, in order to get the second identity, we used…”

Section: The Linearized Geometrymentioning

confidence: 99%

Perturbative superstrata

Giusto

Russo

2013

Nuclear Physics B

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We study a particular class of D-brane bound states in type IIB string theory (dubbed "superstrata") that describe microstates of the 5D Strominger-Vafa black hole. By using the microscopic description in terms of open strings we probe these configurations with generic light closed string states and from there we obtain a linearized solution of six-dimensional supergravity preserving four supersymmetries. We then discuss two generalizations of the solution obtained which capture different types of non-linear corrections. By using this construction, we can provide the first explicit example of a superstratum solution which includes the effects of the KK-monopole dipole charge to first order.

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“…This amplitude was obtained by one loop open string diagram. However, this is equivalent to a tree-level diagram in the closed string exchange [2]. A closed string is generated from the vacuum, propagates for a while and then annihilates again in the vacuum.…”

Section: Introductionmentioning

confidence: 99%