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BIonic membranes and AdS instabilities
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DOI：10.1007/JHEP07(2022)118.png)
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摘要
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We study 4d membranes in type IIA flux compactifications of the form AdS(4) x X-6, where X-6 admits a Calabi-Yau metric. These models feature scale separation and D6-branes/O6-planes on three-cycles of X-6. When the latter are treated as localised sources, explicit solutions to the 10d equations of motion and Bianchi identities are known in 4d N = 1 settings, valid at first order in an expansion parameter related to the AdS(4) cosmological constant. We extend such solutions to a family of perturbatively stable N = 0 vacua, and analyse their non-perturbative stability by looking at 4d membranes. Up to the accuracy of the solution, we find that either D4-branes or anti-D4-branes on holomorphic curves feel no force in both N = 1 and N = 0 AdS(4). Differently, D8-branes wrapping X-6 and with D6-branes ending on them can be superextremal 4d membranes attracted towards the N = 0 AdS(4) boundary. The sources of imbalance are the curvature of X-6 and the D8/D6 BIon profile, with both comparable terms as can be checked for X-6 a (blown-up) toroidal orbifold. We then show that simple N = 0 vacua with space-time filling D6-branes are unstable against bubble nucleation, decaying to N = 0 vacua with less D6-branes and larger Romans mass.
Keyword:
Flux Compactifications
Superstring Vacua
D-Branes
String and Brane Phenomenology
期刊
IF:
5.5
论文数:
4.0W
被引数:
13.7W
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