Johnson, Matthew C. and Larfors, Magdalena (2008) Field dynamics and tunneling in a flux landscape. Physical Review D, 78 (8). Art. No. 083534. ISSN 0556-2821 http://resolver.caltech.edu/CaltechAUTHORS:JOHprd08a
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We investigate field dynamics and tunneling between metastable minima in a landscape of type IIB flux compactifications, utilizing monodromies of the complex structure moduli space to continuously connect flux vacua. After describing the generic features of a flux-induced potential for the complex structure and type IIB axiodilaton, we specialize to the mirror quintic Calabi-Yau to obtain an example landscape. Studying the cosmological dynamics of the complex structure moduli, we find that the potential generically does not support slow-roll inflation and that in general the landscape separates neatly into basins of attraction of the various minima. We then discuss tunneling, with the inclusion of gravitational effects, in many-dimensional field spaces. A set of constraints on the form of the Euclidean paths through field space are presented, and then applied to construct approximate instantons mediating the transition between de Sitter vacua in the flux landscape. We find that these instantons are generically thick wall and that the tunneling rate is suppressed in the large-volume limit. We also consider examples where supersymmetry is not broken by fluxes, in which case near–Bogomolnyi-Prasad-Sommerfeld thin-wall bubbles can be constructed. We calculate the bubble-wall tension, finding that it scales like a D- or NS-brane bubble, and comment on the implications of this correspondence. Finally, we present a brief discussion of eternal inflation in the flux landscape.
|Additional Information:||© 2008 The American Physical Society. (Received 10 June 2008; published 23 October 2008) We would like to thank T. Banks, F. Denef, M. Dine, G. Festuccia, N. Johansson, A. Morisse, B. Underwood and K. Vyas for interesting discussions, and U. Danielsson and T. Dimofte for discussions and comments on the manuscript. M.L. would like to thank Caltech and M.J. would like to thank Uppsala University for their generous hospitality during important stages of this work. M.J. acknowledges support from the Gordon and Betty Moore Foundation.|
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|Deposited On:||24 Oct 2008 21:52|
|Last Modified:||26 Dec 2012 10:27|
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