Zobrazeno 1 - 10
of 71
pro vyhledávání: '"Junghans, Daniel"'
Autor:
Horer, Ludwig, Junghans, Daniel
The classical-dS scenario in the type II string theories proposes to search for dS vacua of orientifold flux compactifications in a regime where string corrections to the compactified effective field theory are negligible. We study a minimal extensio
Externí odkaz:
http://arxiv.org/abs/2406.01690
Autor:
Junghans, Daniel
The DGKT-CFI construction of AdS flux vacua in type IIA string theory has interesting features such as classical moduli stabilization and a parametric scale separation between the Hubble scale and the Kaluza-Klein scale. A possible worry regarding th
Externí odkaz:
http://arxiv.org/abs/2310.17695
Autor:
Junghans, Daniel
It has been proposed that flux compactifications of supercritical string theories (i.e., with spacetime dimension $D>10$) have dS vacua, with large $D$ acting as a control parameter for corrections to the classical spacetime effective action. In this
Externí odkaz:
http://arxiv.org/abs/2308.00026
Autor:
Junghans, Daniel
We elaborate on recent results regarding the self-consistency of de Sitter vacua in the LARGE-volume scenario of type IIB string theory. In particular, we analyze to what extent the control over warping, curvature and $g_s$ corrections depends on the
Externí odkaz:
http://arxiv.org/abs/2205.02856
Autor:
Junghans, Daniel
We argue that dS vacua in the LARGE-volume scenario of type IIB string theory are vulnerable to various unsuppressed curvature, warping and $g_s$ corrections. We work out in general how these corrections affect the moduli vevs, the vacuum energy and
Externí odkaz:
http://arxiv.org/abs/2201.03572
We revisit various aspects of AdS$_4$ flux vacua with scale separation in type II supergravity and M-theory. We show that massless IIA allows both weakly and strongly coupled solutions for which the classical orientifold backreaction can be tuned sma
Externí odkaz:
http://arxiv.org/abs/2107.00019
Publikováno v:
Fortsch.Phys. 2020, 68, 2000089
We analyze to which extent the KKLT proposal for the construction of de Sitter vacua in string theory is quantitatively controlled. Our focus is on the quality of the 10d supergravity approximation. As our main finding, we uncover and quantify an iss
Externí odkaz:
http://arxiv.org/abs/2009.03914
Autor:
Junghans, Daniel
We construct AdS$_4$ flux vacua of type IIA string theory in the supergravity (large volume, small $g_s$) regime, including the backreaction of O6-planes. Our solutions are the localized versions of the smeared solutions on Calabi-Yau orientifolds st
Externí odkaz:
http://arxiv.org/abs/2003.06274
Autor:
Cribiori, Niccolò, Junghans, Daniel
It was recently proposed that type IIA string theory may allow classical de Sitter solutions with O8-planes as the only localized sources. We show that such solutions are incompatible with the integrated supergravity equations of motion, analogously
Externí odkaz:
http://arxiv.org/abs/1902.08209
Autor:
Junghans, Daniel, Zagermann, Marco
We study supersymmetric AdS$_7$ vacua of massive type IIA string theory, which were argued to describe the near-horizon limit of NS5/D6/D8-brane intersections and to be holographically dual to 6D $(1,0)$ theories. We show, for the case without D8-bra
Externí odkaz:
http://arxiv.org/abs/1902.04084