The world next door – Results in landscape topography

Danielsson, Ulf H.; Johansson, Niklas; Larfors, Magdalena

doi:10.1088/1126-6708/2007/03/080

Cited by 28 publications

(80 citation statements)

References 26 publications

(50 reference statements)

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“…It has been shown by one of the authors that there are continuous sequences of vacua related by monodromies in Type IIB flux compactifications [16], and possibly an infinite number of them [30]. The simple example of the torus captures many of the features found in such Type IIB flux landscapes, and should be kept in mind as we discuss more complicated internal manifolds.…”

Section: B Moduli Stabilization and The Landscapementioning

confidence: 95%

“…This model was studied previously in [16], to which we refer the reader for notation and additional details. The Mirror Quintic possesses 101 Kähler moduli and a single complex structure modulus, and provides a simple model for studying the structure of the potential on complex structure moduli space.…”

Section: Mirror Quintic Calabi-yaumentioning

confidence: 99%

“…The potential induced for the axio-dilaton, τ , is particularly simple. At fixed z for a given flux configuration, the extrema of the potential are determined by a quadratic equation in τ [16], the physical root of which corresponds to a global minimum. The imaginary part of τ determines the string coupling, which we must ensure is less than unity in order to maintain the validity of the supergravity approximation.…”

Section: Mirror Quintic Calabi-yaumentioning

confidence: 99%

“…. We can perform any number of conifold and LCS monodromies, creating a large number of levels, and potentially a large number of continuously connected minima [16,30]. We will also find it convenient to define polar coordinates about the conifold point, R 2 = z 2 I + (z R − 1) 2 and tan(Φ) = z I /(z R − 1), which allows us to "unwrap" the potential a nd remove one of the branch cuts.…”

Section: B the Four-dimensional Actionmentioning

confidence: 99%

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Field dynamics and tunneling in a flux landscape

Johnson

Larfors

2008

Phys. Rev. D

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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 axio-dilaton, 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-BPS 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.

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Section: B Moduli Stabilization and The Landscapementioning

confidence: 95%

Section: Mirror Quintic Calabi-yaumentioning

confidence: 99%

Section: Mirror Quintic Calabi-yaumentioning

confidence: 99%

Section: B the Four-dimensional Actionmentioning

confidence: 99%

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Field dynamics and tunneling in a flux landscape

Johnson

Larfors

2008

Phys. Rev. D

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“…Moreover, for one parameter Calabi-Yau compactifications it was shown in [42] that the neighbourhood of an LCS point contains no supersymmetric vacua, except for one sitting right at the LCS point [43].…”

Section: Jhep03(2016)064mentioning

confidence: 99%

Universal properties of type IIB and F-theory flux compactifications at large complex structure

Marsh¹,

Sousa²

2016

J. High Energ. Phys.

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Abstract:We consider flux compactifications of type IIB string theory and F-theory in which the respective superpotentials at large complex structure are dominated by cubic or quartic terms in the complex structure moduli. In this limit, the low-energy effective theory exhibits universal properties that are insensitive to the details of the compactification manifold or the flux configuration. Focussing on the complex structure and axio-dilaton sector, we show that there are no vacua in this region and the spectrum of the Hessian matrix is highly peaked and consists only of three distinct eigenvalues (0, 2m 2 3/2 and 8m 2 3/2 ), independently of the number of moduli. We briefly comment on how the inclusion of Kähler moduli affect these findings. Our results generalise those of Brodie & Marsh [1], in which these universal properties were found in a subspace of the large complex structure limit of type IIB compactifications.

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Discovering the landscape: gravitational waves from first order transitions during inflation

Chialva

2011

Fortschritte der Physik

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Scenarios such as the string landscape present the possibility of having various first order transitions during the evolution of the early Universe, specifically during inflation. The gravitational waves emitted from the physical processes related to these first order phase transitions carry clear information regarding the physics that produced them. We study the features of the waves and find that they differ both from those of waves generated via quantum oscillations of the metric in vacuum and both from those of waves sourced by transitions occurring outside inflation. We also investigate the detectability of the waves.

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The world next door – Results in landscape topography

Cited by 28 publications

References 26 publications

Field dynamics and tunneling in a flux landscape

Field dynamics and tunneling in a flux landscape

Universal properties of type IIB and F-theory flux compactifications at large complex structure

Discovering the landscape: gravitational waves from first order transitions during inflation

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