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of 34
pro vyhledávání: '"Roupec, Christoph"'
Autor:
Roupec, Christoph
One of the main goals of the field of string phenomenology is to describe the properties of our spacetime in low-energy effective models related to and consistent with string theory. It is known that our universe undergoes accelerated expansion, whic
Externí odkaz:
http://arxiv.org/abs/2203.10125
Publikováno v:
JHEP07(2020)189
We discuss how to incorporate non-supersymmetric branes in compactifications of type II string theories. We particularly focus on flux compactifications on $SU(3)\times SU(3)$ structure manifolds to four dimensions, so that a linear $\mathcal{N}=1$ s
Externí odkaz:
http://arxiv.org/abs/2004.13110
Publikováno v:
Phys. Rev. D 101, 046018 (2020)
We study M-theory compactification on ${\mathbb{T}^7/ \mathbb{Z}_2^3}$ in the presence of a seven-flux, metric fluxes and KK monopoles. The effective four-dimensional supergravity has seven chiral multiplets whose couplings are specified by the $G_2$
Externí odkaz:
http://arxiv.org/abs/1912.02791
We describe several applications of the recently proposed mass production procedure, where multiple moduli are stabilized in a dS vacuum, in supergravity models inspired by string theory. The construction involves a small downshift of an initial supe
Externí odkaz:
http://arxiv.org/abs/1912.00027
A simple, KKLT-like construction of de Sitter vacua in type IIA string theory is presented in an STU model with guidance from string theory U-duality and with an uplifting anti-D6-brane. In four dimensions the model is reduced to $\mathcal{N}=1$ supe
Externí odkaz:
http://arxiv.org/abs/1909.08629
Publikováno v:
Phys. Rev. D 100, 066001 (2019)
An anti-D3-brane plays a crucial role in the construction of semi-realistic cosmological models in string theory. Part of its action provides an uplift term that has been used to lift AdS solutions to phenomenologically viable dS vacua in the KKLT an
Externí odkaz:
http://arxiv.org/abs/1906.07727
Autor:
Andriot, David, Roupec, Christoph
We propose an alternative refined de Sitter conjecture. It is given by a natural condition on a combination of the first and second derivatives of the scalar potential. We derive our conjecture in the same weak coupling, semi-classical regime where t
Externí odkaz:
http://arxiv.org/abs/1811.08889
Publikováno v:
JHEP03(2019)065
We discuss the properties of massive type IIA flux compactifications. In particular, we investigate in which case one can obtain dS vacua at large volume and small coupling. We support a general discussion of scaling symmetries with the analysis of a
Externí odkaz:
http://arxiv.org/abs/1811.07880
Autor:
Roupec, Christoph, Wrase, Timm
Publikováno v:
Fortschr. Phys. 2018, 1800082
Recently it has been conjectured that string theory does not allow for dS vacua or dS extrema. To scrutinize such a conjecture, it is important to study concrete string theory compactifications and spell out their assumptions and potential shortcomin
Externí odkaz:
http://arxiv.org/abs/1807.09538
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