40 citations · 95 across the 6 of their papers we have counts for
6 papers
Cosmic eggs to relax the cosmological constant
Thomas Hertog, Rob Tielemans, Thomas Van Riet
In theories with extra dimensions, the cosmological hierarchy problem can be thought of as the unnaturally large radius of the observable universe in Kaluza-Klein units. We sketch…
Anti-brane singularities as red herrings
J. Blåbäck, F. F Gautason, A. Ruipérez +1
Unphysical 3-form flux singularities near anti-branes have been argued to get resolved in the classical supergravity regime when brane polarisation is properly taken into account.…
Euclidean axion wormholes have multiple negative modes
Thomas Hertog, Brecht Truijen, Thomas Van Riet
We show that Euclidean axion wormholes in theories of gravity coupled to a single axion have several independent inhomogeneous perturbations that lower the Euclidean action. Our an…
Black holes, first-order flow equations and geodesics on symmetric spaces
Jan Perz, Paul Smyth, Thomas Van Riet +1
For both extremal and non-extremal spherically symmetric black holes in theories with massless scalars and vectors coupled to gravity, we derive a general form of first-order gradi…
Scaling Cosmologies of N=8 Gauged Supergravity
Jan Rosseel, Thomas Van Riet, Dennis B. Westra
We construct exact cosmological scaling solutions in N=8 gauged supergravity. We restrict to solutions for which the scalar fields trace out geodesic curves on the scalar manifold.…
Dynamics of Generalized Assisted Inflation
Jelle Hartong, André Ploegh, Thomas Van Riet +1
We study the dynamics of multiple scalar fields and a barotropic fluid in an FLRW-universe. The scalar potential is a sum of exponentials. All critical points are constructed and t…