scholarly journals Moduli stabilization, de Sitter vacua and supersymmetry breaking

2017 ◽  
Author(s):  
Ignatios Antoniadis
Keyword(s):  
Supersymmetry Breaking ◽  
De Sitter ◽  
Moduli Stabilization ◽  
De Sitter Vacua

scholarly journals Supersymmetry breaking branes on solvmanifolds and de Sitter vacua in string theory

2011 ◽  
Vol 2011 (5) ◽  
Author(s):  
David Andriot ◽  
Enrico Goi ◽  
Ruben Minasian ◽  
Michela Petrini
Keyword(s):  
String Theory ◽  
Supersymmetry Breaking ◽  
De Sitter ◽  
De Sitter Vacua

scholarly journals The tadpole problem

2021 ◽  
Vol 2021 (11) ◽  
Author(s):  
Iosif Bena ◽  
Johan Blåbäck ◽  
Mariana Graña ◽  
Severin Lüst
Keyword(s):  
Moduli Space ◽  
Complex Structure ◽  
De Sitter ◽  
Generic Point ◽  
Cancellation Condition ◽  
Moduli Stabilization ◽  
Induced Charge ◽  
De Sitter Vacua ◽  
Breaking Scale ◽  
Rule Out

Abstract We examine the mechanism of moduli stabilization by fluxes in the limit of a large number of moduli. We conjecture that one cannot stabilize all complex-structure moduli in F-theory at a generic point in moduli space (away from singularities) by fluxes that satisfy the bound imposed by the tadpole cancellation condition. More precisely, while the tadpole bound in the limit of a large number of complex-structure moduli goes like 1/4 of the number of moduli, we conjecture that the amount of charge induced by fluxes stabilizing all moduli grows faster than this, and is therefore larger than the allowed amount. Our conjecture is supported by two examples: K3 × K3 compactifications, where by using evolutionary algorithms we find that moduli stabilization needs fluxes whose induced charge is 44% of the number of moduli, and Type IIB compactifications on $$ \mathbbm{CP} $$ CP 3, where the induced charge of the fluxes needed to stabilize the D7-brane moduli is also 44% of the number of these moduli. Proving our conjecture would rule out de Sitter vacua obtained via antibrane uplift in long warped throats with a hierarchically small supersymmetry breaking scale, which require a large tadpole.

scholarly journals An update on moduli stabilization with antibrane uplift

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Emilian Dudas ◽  
Severin Lüst
Keyword(s):  
Cosmological Constant ◽  
Supersymmetry Breaking ◽  
Light Field ◽  
Complex Structure ◽  
Small Scale ◽  
De Sitter ◽  
Moduli Stabilization ◽  
Matter Fields

Abstract It was recently shown that in warped compactifications based on a Klebanov-Strassler throat there is a light complex structure field, governing the size of the throat and the redshift at its tip. We show that after uplift of the cosmological constant by an anti-D3 brane at the tip of the throat, the contribution to supersymmetry breaking coming from the new light field is large. We work out the mass scales, in particular the condition for this field to be heavier than the Kähler modulus. We check that for the range of parameters relevant for the destabilization we find agreement with de Sitter swampland conjecture. Adding matter fields on distant branes, we discuss the effects on supersymmetry breaking in the observable sector. A hierarchically small scale of supersymmetry breaking translates generically into large values of localized D3 charges in the manifold.

scholarly journals MODULI STABILIZATION IN STRINGY ISS MODELS

2008 ◽  
Vol 23 (14n15) ◽  
pp. 2190-2191
Author(s):  
MASAHITO YAMAZAKI
Keyword(s):  
Cosmological Constant ◽  
Susy Breaking ◽  
Fine Tuning ◽  
De Sitter ◽  
Moduli Stabilization ◽  
De Sitter Vacua

We present a stringy realization of the ISS metastable SUSY breaking model with moduli stabilization. The mass moduli of the ISS model is stabilized by gauging of a U(1) symmetry and its D-term potential. The SUSY is broken both by F-terms and D-terms. It is possible to obtain de-Sitter vacua with a vanishingly small cosmological constant by an appropriate fine-tuning of flux parameters. The content of this article is based on our recent paper1, which is in collaboration with Yu Nakayama (Berkeley) and Tsutomu Yanagida (Tokyo).

scholarly journals Three-dimensional flux vacua from IIB on co-calibrated G2 orientifolds

2021 ◽  
Vol 81 (5) ◽  
Author(s):  
Maxim Emelin ◽  
Fotis Farakos ◽  
George Tringas
Keyword(s):  
Supersymmetry Breaking ◽  
Three Dimensional ◽  
Closed String ◽  
De Sitter ◽  
Scale Separation ◽  
Moduli Stabilization ◽  
Flux Quantization ◽  
G2 Structure

AbstractWe derive the 3D N = 1 superpotential for the closed string sector of type IIB supergravity on toroidal O5 orientifolds with co-calibrated G2 structure and RR background flux. We find that such compactifications can provide full closed string moduli stabilization on supersymmetric $$\hbox {AdS}_3$$ AdS 3 vacua, and once we include brane-supersymmetry-breaking we also find indication for the existence of classical 3D de Sitter solutions. The latter however are rather difficult to reconcile with the “shape” moduli stabilization and flux quantization. We also discuss the possibility of achieving scale separation in $$\hbox {AdS}_3$$ AdS 3 and $$\hbox {dS}_3$$ dS 3 vacua, but such effects seem to be hindered by the geometric flux quantization.

scholarly journals de Sitter vacua and supersymmetry breaking in six-dimensional flux compactifications

2016 ◽  
Vol 94 (2) ◽  
Author(s):  
Wilfried Buchmuller ◽  
Markus Dierigl ◽  
Fabian Ruehle ◽  
Julian Schweizer
Keyword(s):  
Flux Compactifications ◽  
Supersymmetry Breaking ◽  
De Sitter ◽  
De Sitter Vacua
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