Zobrazeno 1 - 10
of 204
pro vyhledávání: '"Wrase, Timm"'
We study moduli stabilization via fluxes in the $2^6$ Landau-Ginzburg model. Fluxes not only give masses to scalar fields but can also induce higher order couplings that stabilize massless fields. We investigate this for several different flux choice
Externí odkaz:
http://arxiv.org/abs/2407.16756
Recent work on flux compactifications suggests that the tadpole constraint generically allows only a limited number of complex structure moduli to become massive, i.e., be stabilized at quadratic order in the spacetime superpotential. We study the ef
Externí odkaz:
http://arxiv.org/abs/2406.03435
We explore the possibility that our universe's current accelerated expansion is explained by a quintessence model with an exponential scalar potential, $V =V_0\, e^{-\lambda\, \phi}$, keeping an eye towards $\lambda \geq \sqrt{2}$ and an open univers
Externí odkaz:
http://arxiv.org/abs/2405.09323
For decades intersecting D-branes and O-planes have been playing a very important role in string phenomenology in the context of particle physics model building and in the context of flux compactifications. The corresponding supergravity equations ar
Externí odkaz:
http://arxiv.org/abs/2403.09873
Recently, many works have tried to realize cosmological accelerated expansion in string theory models in the asymptotic regions of field space, with a typical scalar potential $V(\varphi)$ having an exponential fall-off $e^{-\gamma\, \varphi}$. Those
Externí odkaz:
http://arxiv.org/abs/2309.03938
Publikováno v:
JHEP 09 (2023) 075
We examine bounds on accelerated expansion in asymptotic regions of the moduli space in string theory compactifications to four spacetime dimensions. While there are conjectures that forbid or constrain accelerated expansion in such asymptotic region
Externí odkaz:
http://arxiv.org/abs/2306.15714
Type IIB flux vacua based on Landau-Ginzburg models without K\"ahler deformations provide fully-controlled insights into the non-geometric and strongly-coupled string landscape. We show here that supersymmetric flux configurations at the Fermat point
Externí odkaz:
http://arxiv.org/abs/2210.03706
Publikováno v:
JHEP12(2022)026
Classical flux compactifications contribute to a well-controlled corner of the string landscape, therefore providing an important testing ground for a variety of conjectures. We focus here on type II supergravity compactifications on 6d group manifol
Externí odkaz:
http://arxiv.org/abs/2209.08015
It was argued in \cite{DallAgata:2022abm} that the Volkov-Akulov (VA) model as well as similar models in supergravity and the related KKLT model in string theory, suffer from tachyonic instabilities due to goldstino condensation. The authors of \cite
Externí odkaz:
http://arxiv.org/abs/2206.04210
We revisit flux compactifications of type IIB string theory on `spaces' dual to rigid Calabi-Yau manifolds. This rather unexplored part of the string landscapes harbors many interesting four-dimensional solutions, namely supersymmetric $\mathcal{N}=1
Externí odkaz:
http://arxiv.org/abs/2203.15818