Gravitational couplings and Z2 orientifolds

Dasgupta, Keshav; Jatkar, Dileep P.; Mukhi, Sunil

doi:10.1016/s0550-3213(98)00155-2

Cited by 119 publications

(160 citation statements)

References 29 publications

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“…It is known [3,4] that wrapping a Dp-brane on K3 induces a negative unit of D(p − 4)-brane charge in the unwrapped part of the worldvolume. As this is a BPS object, this gives a corresponding negative contribution to the tension of the wrapped object [5,6]. At strong coupling (or large charges), where the D-branes have a non-trivial back-reaction on the geometry, for generic combinations of parameters it was shown in ref.…”

Section: Introductionmentioning

confidence: 77%

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The enhançon, black holes, and the second law

Johnson

Myers

2001

Phys. Rev. D

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We revisit the physics of five-dimensional black holes constructed from D5-and D1-branes and momentum modes in type IIB string theory compactified on K3. Since these black holes incorporate D5-branes wrapped on K3, an enhançon locus appears in the spacetime geometry. With a "small" number of D1-branes, the entropy of a black hole is maximised by including precisely half as many D5-branes as there are D1-branes in the black hole. Any attempts to introduce more D5-branes, and so reduce the entropy, are thwarted by the appearance of the enhançon locus above the horizon, which then prevents their approach. The enhançon mechanism thereby acts to uphold the Second Law of Thermodynamics. This result generalises: For each type of bound state object which can be made of both types of brane, we show that a new type of enhançon exists at successively smaller radii in the geometry, again acting to prevent any reduction of the entropy just when needed. We briefly explore the appearance of the enhançon locus in the black hole interior.

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Section: Introductionmentioning

confidence: 77%

“…So the entropy S ≡ log(Ω) = 2π √ Q 1 Q 5 Q P , which precisely matches the strong coupling Bekenstein-Hawking result from the supergravity solution listed below eqn. (5).…”

Section: Evaluating the Entropy In Gauge Theorymentioning

confidence: 99%

The enhançon, black holes, and the second law

Johnson

Myers

2001

Phys. Rev. D

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“…10 However, once we accept (6.26) as the quantum version of the exponentiated Kähler class, this ambiguity is lifted, and we come back to the same old Chern-Simons coupling to spacetime RR-tensors for D-branes and Orientifold planes [23,[27][28][29][30][31][32].…”

Section: Jhep02(2014)103mentioning

confidence: 99%

“…In terms of the characteristic classes, we rewrite this 30) with M −2 is complex co-dimension 2 fixed locus, (…”

Section: Orientifold Planes Of Complex Co-dimensions 2 and N −mentioning

confidence: 99%

Exact partition functions on $ \mathbb{R}{{\mathbb{P}}^2} $ and orientifolds

Kim

Lee

2014

J. High Energ. Phys.

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We consider gauged linear sigma models (GLSM) on RP 2 , obtained from a parity projection of S 2 . The theories admit squashing deformation, much like GLSM on S 2 , which allows us to interpret the partition function as the overlap amplitude between the vacuum state and crosscap states. From these, we extract the central charge of Orientifold planes, and observe that the Gamma class makes a prominent appearance as in the recent D-brane counterpart. We also repeat the computation for the mirror Landau-Ginzburg theory, which naturally brings out the θ-dependence as a relative sign between two holonomy sectors on RP 2 . We also show how our results are consistent with known topological properties of D-brane and Orientifold plane world-volumes, and discuss what part of the wrapped D-brane/Orientifold central charge should be attributed to the quantum volumes.

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“…On the other hand, there is inflow. The anomalous couplings on the D3-branes and O7-plane [20,21,22] are given by:…”

Section: An Anomaly Puzzlementioning

confidence: 99%

Localized modes at a D-brane—O-plane intersection and heterotic Alice strings

Harvey

Royston

2008

J. High Energy Phys.

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We study a system of N c D3-branes intersecting D7-branes and O7-planes in 1 + 1-dimensions. We use anomaly cancellation and string dualities to argue that there must be chiral fermion zero-modes on the D3-branes which are localized near the O7-planes. Away from the orientifold limit we verify this by using index theory as well as explicit construction of the zero-modes. This system is related to F-theory on K3 and heterotic matrix string theory, and the heterotic strings are related to Alice string defects in N = 4 Super-Yang-Mills. In the limit of large N c we find an AdS 3 dual of the heterotic matrix string CFT.

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Gravitational couplings and Z2 orientifolds

Cited by 119 publications

References 29 publications

The enhançon, black holes, and the second law

The enhançon, black holes, and the second law

Exact partition functions on $ \mathbb{R}{{\mathbb{P}}^2} $ and orientifolds

Localized modes at a D-brane—O-plane intersection and heterotic Alice strings

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