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Moduli Stabilization from Fluxes in a Simple IIB Orientifold
, 2002
"... We study novel type IIB compactifications on the T 6 /Z2 orientifold. This geometry arises in the Tdual description of Type I theory on T 6, and one normally introduces 16 spacefilling D3branes to cancel the RR tadpoles. Here, we cancel the RR tadpoles either partially or fully by turning on thre ..."
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Cited by 154 (11 self)
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We study novel type IIB compactifications on the T 6 /Z2 orientifold. This geometry arises in the Tdual description of Type I theory on T 6, and one normally introduces 16 spacefilling D3branes to cancel the RR tadpoles. Here, we cancel the RR tadpoles either partially or fully by turning on threeform flux in the compact geometry. The resulting (super)potential for moduli is calculable. We demonstrate that one can find many examples of N = 1 supersymmetric vacua with greatly reduced numbers of moduli in this system. A few examples with N> 1 supersymmetry or complete supersymmetry breaking are also discussed.
Freezing of moduli with fluxes in three dimensions, Nucl. Phys. B640
, 2002
"... We study warped compactifications to three dimensions, realized as an orientifold of type IIA string theory on T 7. By turning on 3and 4form fluxes on the torus in a supersymmetric way, we generate a potential for the moduli fields. We present various flux configurations with N = 1, 2, 3, 4, 5, 6 ..."
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Cited by 4 (0 self)
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We study warped compactifications to three dimensions, realized as an orientifold of type IIA string theory on T 7. By turning on 3and 4form fluxes on the torus in a supersymmetric way, we generate a potential for the moduli fields. We present various flux configurations with N = 1, 2, 3, 4, 5, 6 supersymmetries and count the number of moduli in each case. In particular, we show that there are N = 1 Generic supersymmetric compactifications of string and Mtheory lead to a lowenergy effective theory in the noncompact dimensions which contains a number of moduli fields. These are massless scalars whose expectation value at infinity parameterizes the vacua of the lowenergy theory. Typically, it
String theory duals for massdeformed SO(N) and USp(2N
 N = 4 SYM theories,” Phys. Rev. D
, 2000
"... We generalize the results of Polchinski and Strassler regarding the N = 1preserving mass deformation of N = 4 SU(N) SYM theories and its string theory dual to SO(N) and USp(2N) gauge groups. The string theory duals involve 5branes wrapped on RP 2. In order to match with the field theory classifica ..."
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We generalize the results of Polchinski and Strassler regarding the N = 1preserving mass deformation of N = 4 SU(N) SYM theories and its string theory dual to SO(N) and USp(2N) gauge groups. The string theory duals involve 5branes wrapped on RP 2. In order to match with the field theory classification of vacua, the 3brane charge carried by such 5branes must be shifted by a half, and this follows from a conjectured generalization of results of Freed and Witten. Our results provide an elegant physical picture for the classification of classically massive vacua in the massdeformed N = 4 theories.
hepth/0004092 Mirror symmetry by O3planes
, 2000
"... Abstract: We construct the three dimensional mirror theory of SO(2k) and SO(2k+1) gauge groups by using O3planes. An essential ingredient in constructing the mirror is the splitting of a physical brane (NSbrane or D5brane) on O3planes. In particular, matching the dimensions of moduli spaces of m ..."
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Abstract: We construct the three dimensional mirror theory of SO(2k) and SO(2k+1) gauge groups by using O3planes. An essential ingredient in constructing the mirror is the splitting of a physical brane (NSbrane or D5brane) on O3planes. In particular, matching the dimensions of moduli spaces of mirror pair (for example, the SO(2k + 1) and its mirror) there is a D3brane creation or annihilation accompanying the splitting. This novel dynamical process gives a nontrivial prediction for strongly coupled field theories, which will be very interesting to check by SeibergWitten curves. Furthermore, applying the same idea, we revisit the mirror theory of Sp(k) gauge group and find new mirrors which differ from previously known results. Our new result for Sp(k) gives another example to a previously observed fact, which shows that different theories can be mirror to the same theory. We also discussed the phenomena such as “hidden FIparameters ” when the number of flavors and the rank of the gauge group satisfy certain relations, “incomplete Higgsing” for the mirror of SO(2k + 1) and the “hidden global symmetry”. After discussing the mirror for a single Sp or SO gauge group, we extend the study to a product of two gauge groups in two different models, namely the elliptic and the nonelliptic models. Keywords: Mirror symmetry, O3plane. Contents
with a Giant Fuzzy Moose
, 2001
"... We argue that the worldvolume theories of Dbranes probing orbifolds with discrete torsion develop, in the large quiver limit, new noncommutative directions. This provides an explicit ‘deconstruction ’ of a wide class of noncommutative theories. This also provides insight into the physical meaning ..."
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We argue that the worldvolume theories of Dbranes probing orbifolds with discrete torsion develop, in the large quiver limit, new noncommutative directions. This provides an explicit ‘deconstruction ’ of a wide class of noncommutative theories. This also provides insight into the physical meaning of discrete torsion and its relation to the Tdual B field. We demonstrate that the strict large quiver limit reproduces the matrix theory construction of higherdimensional Dbranes, and argue that finite ‘fuzzy moose ’ theories provide novel regularizations of noncommutative theories and explicit string theory realizations of gauge theories on fuzzy tori. We also comment briefly on the relation to NCOS, (2,0) and little string theories.