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Dbrane charges in Gepner models
"... We construct Gepner models in terms of coset conformal field theories and compute their twisted equivariant Ktheories. These classify the Dbrane charges on the associated geometric backgrounds and therefore agree with the topological Ktheories. We show this agreement for various cases, ..."
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We construct Gepner models in terms of coset conformal field theories and compute their twisted equivariant Ktheories. These classify the Dbrane charges on the associated geometric backgrounds and therefore agree with the topological Ktheories. We show this agreement for various cases,
Dbrane charges on
 SO(3), JHEP 11 (2004) 082 [hepth/0404017
"... Preprint typeset in JHEP style HYPER VERSION hepth/0504007 ..."
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Preprint typeset in JHEP style HYPER VERSION hepth/0504007
DBrane Charges and KHomology
 J. High Energy Phys
, 2000
"... It is argued that Dbrane charge takes values in Khomology. For smooth manifolds with spin structure, this could explain why the phase factor Ω(x) calculated with a Dbrane state x in IIB theory appears in Diaconescu, Moore and Witten’s computation of the partition function of IIA string theory. Di ..."
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It is argued that Dbrane charge takes values in Khomology. For smooth manifolds with spin structure, this could explain why the phase factor Ω(x) calculated with a Dbrane state x in IIB theory appears in Diaconescu, Moore and Witten’s computation of the partition function of IIA string theory
Dbrane charges on SO(3)
, 2005
"... In this letter we discuss charges of Dbranes on the group manifold SO(3). Our discussion will be based on a conformal field theory analysis of boundary states in a Z2orbifold of SU(2). This orbifold differs from the one recently discussed by Gaberdiel and Gannon in its action on the fermions and l ..."
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In this letter we discuss charges of Dbranes on the group manifold SO(3). Our discussion will be based on a conformal field theory analysis of boundary states in a Z2orbifold of SU(2). This orbifold differs from the one recently discussed by Gaberdiel and Gannon in its action on the fermions
Anomalous DBrane Charge in FTheory Compacti
 hepth/0007212, JHEP 0009
, 2000
"... Unité mixte du CNRS et de l’EP, UMR 7644 Tadpole cancellation in Ftheory on an elliptic CalabiYau fourfold X → B3 demands some spacetimefilling threebranes (points in B3). If moved to the discriminant surface, which supports the gauge group, and dissolved into a finite size instanton, the second ..."
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, the second Chern class of the corresponding bundle E is expected to give a compensating contribution. However the dependence of Dbrane charge on the geometry of W and on the embedding i: W → B3 gives a correction to c2(E). We show how this is reconciled by considering the torsion sheaf i∗E and discuss some
Topics on Dbrane charges with Bfields
, 2004
"... In this review we show how Ktheory classifies RRcharges in type II string theory and how the inclusion of the Bfield modifies the general structure leading to the twisted Kgroups. Our main purpose is to give an expository account of the physical relevance of Ktheory and, in order to make it, we ..."
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, we consider different points of view: processes of tachyon condensation, cancellation of global anomalies and gauge fixings. As a field to test the proposals of Ktheory, we concentrate on the study of the D6brane,
A note on the equality of algebraic and geometric Dbrane charges
 in WZW models.” JHEP 05
, 2004
"... Abstract. The algebraic definition of charges for symmetrypreserving Dbranes in WessZuminoWitten models is shown to coincide with the geometric definition, for all simple Lie groups. The charge group for such branes is computed from the ambiguities inherent in the geometric definition. ..."
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Abstract. The algebraic definition of charges for symmetrypreserving Dbranes in WessZuminoWitten models is shown to coincide with the geometric definition, for all simple Lie groups. The charge group for such branes is computed from the ambiguities inherent in the geometric definition.
hepth/0403011 Dbrane charges on nonsimply connected groups
, 2004
"... The maximally symmetric Dbranes of string theory on the nonsimply connected Lie group SU(n)/Zd are analysed using conformal field theory methods, and their charges are determined. Unlike the well understood case for simply connected groups, the charge equations do not determine the charges uniquel ..."
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The maximally symmetric Dbranes of string theory on the nonsimply connected Lie group SU(n)/Zd are analysed using conformal field theory methods, and their charges are determined. Unlike the well understood case for simply connected groups, the charge equations do not determine the charges
hepth/0403011 Dbrane charges on nonsimply connected groups
, 2004
"... The maximally symmetric Dbranes of string theory on the nonsimply connected Lie group SU(n)/Zd are analysed using conformal field theory methods, and their charges are determined. Unlike the well understood case for simply connected groups, the charge equations do not determine the charges uniquel ..."
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The maximally symmetric Dbranes of string theory on the nonsimply connected Lie group SU(n)/Zd are analysed using conformal field theory methods, and their charges are determined. Unlike the well understood case for simply connected groups, the charge equations do not determine the charges
Results 1  10
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