179 citations · 1k across the 36 of their papers we have counts for
37 papers
Proof of absence of de Sitter vacua in classical type II supergravity
Harald Skarke
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 neve…
Redshift and gauge choice
Harald Skarke
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 f…
All Weight Systems for Calabi-Yau Fourfolds from Reflexive Polyhedra
Friedrich Schöller, Harald Skarke
For any given dimension , all reflexive -polytopes can be found (in principle) as subpolytopes of a number of maximal polyhedra that are defined in terms of -tuples of…
Calabi-Yau manifolds and sporadic groups
Andreas Banlaki, Abhishek Chowdhury, Abhiram Kidambi +3
A few years ago a connection between the elliptic genus of the K3 manifold and the largest Mathieu group M was proposed. We study the elliptic genera for Calabi-Yau manifold…
Cosmic Acceleration as an Optical Illusion
Harald Skarke
We consider light propagation in an inhomogeneous irrotational dust universe with vanishing cosmological constant, with initial conditions as in standard linear perturbation theory…
The Evolution of an Inhomogeneous Universe
Harald Skarke
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 computa…