Zobrazeno 1 - 10
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pro vyhledávání: '"Skarke, Harald"'
Autor:
Skarke, Harald
We consider classical type II supergravity with arbitrary fluxes, Dirichlet branes and orientifold planes and prove that a four-dimensional compactification of this theory can never correspond to a metastable de Sitter state.
Comment: The proof
Comment: The proof
Externí odkaz:
http://arxiv.org/abs/2109.01832
Autor:
Skarke, Harald
Publikováno v:
Phys. Rev. D 102, 123520 (2020)
We show that a specific gauge choice comes extremely close to defining a frame whose preferred observers see a dipole-free CMB. In this gauge the metric is the product of a scale factor depending on all spacetime coordinates, and a metric featuring a
Externí odkaz:
http://arxiv.org/abs/2001.09889
Autor:
Schöller, Friedrich, Skarke, Harald
Publikováno v:
Commun. Math. Phys. 372 (2019) 657-678
For any given dimension $d$, all reflexive $d$-polytopes can be found (in principle) as subpolytopes of a number of maximal polyhedra that are defined in terms of $(d+1)$-tuples of integers (weights), or combinations of $k$-tuples of weights with $k<
Externí odkaz:
http://arxiv.org/abs/1808.02422
Autor:
Banlaki, Andreas, Chowdhury, Abhishek, Kidambi, Abhiram, Schimpf, Maria, Skarke, Harald, Wrase, Timm
Publikováno v:
JHEP02(2018)129
A few years ago a connection between the elliptic genus of the K3 manifold and the largest Mathieu group M$_{24}$ was proposed. We study the elliptic genera for Calabi-Yau manifolds of larger dimensions and discuss potential connections between the e
Externí odkaz:
http://arxiv.org/abs/1711.09698
Autor:
Skarke, Harald
We consider light propagation in an inhomogeneous irrotational dust universe with vanishing cosmological constant, with initial conditions as in standard linear perturbation theory. A non-perturbative approach to the dynamics of such a universe is co
Externí odkaz:
http://arxiv.org/abs/1508.01510
Autor:
Skarke, Harald
Publikováno v:
Phys. Rev. D 90, 063523 (2014)
A refined version of a recently introduced method for analysing the dynamics of an inhomogeneous irrotational dust universe is presented. A fully non-perturbative numerical computation of the time dependence of volume in this framework leads to the f
Externí odkaz:
http://arxiv.org/abs/1407.6602
Autor:
Skarke, Harald
Publikováno v:
Phys. Rev. D 89, 043506 (2014)
The Einstein equations for an inhomogeneous irrotational dust universe are analysed. A set of mild assumptions, all of which are shared by the standard FLRW type scenarios, results in a model that depends only on the distribution of scalar spatial cu
Externí odkaz:
http://arxiv.org/abs/1310.1028
Autor:
Skarke, Harald
The question posed in the title is answered in terms of a simple pictorial argument that is manifestly symmetric between the two functions that are Legendre transform of each other.
Comment: Latex, 3 pages, 1 figure
Comment: Latex, 3 pages, 1 figure
Externí odkaz:
http://arxiv.org/abs/1209.6193
Publikováno v:
Commun.Math.Phys. 324 (2013) 937-959
Even a cursory inspection of the Hodge plot associated with Calabi-Yau threefolds that are hypersurfaces in toric varieties reveals striking structures. These patterns correspond to webs of elliptic-K3 fibrations whose mirror images are also elliptic
Externí odkaz:
http://arxiv.org/abs/1207.4792
This article provides a complete user's guide to version 2.1 of the toric geometry package PALP by Maximilian Kreuzer and others. In particular, previously undocumented applications such as the program nef.x are discussed in detail. New features of P
Externí odkaz:
http://arxiv.org/abs/1205.4147