19 citations · 25 across the 6 of their papers we have counts for
6 papers
The IKKT renormalization group flow is IIB: toward zero-d holography
Xiangwen Guan, Joel Karlsson, Sébastien Reymond +1
Supergravity solutions describing stacks of D-branes with feature a non-constant dilaton profile, which is holographically mapped to the running of the SYM coupling in…
An ode to instantons
Oliver Janssen, Joel Karlsson, Flavio Riccardi +1
We present a formalism for semiclassical time evolution in quantum mechanics, building on a century of work. We identify complex saddle points in real time, real saddle points in c…
The Kontsevich-Segal Criterion in the No-Boundary State Constrains Anisotropy
Thomas Hertog, Oliver Janssen, Joel Karlsson
We show that the Kontsevich-Segal-Witten (KSW) criterion applied to the no-boundary state constrains anisotropic deformations of de Sitter space. We consider squashed and $S^…
The Kontsevich-Segal Criterion in the No-Boundary State Constrains Inflation
Thomas Hertog, Oliver Janssen, Joel Karlsson
We show that the Kontsevich-Segal (KS) criterion, applied to the complex saddles that specify the semiclassical no-boundary wave function, acts as a selection mechanism on inflatio…
The complete Kaluza-Klein spectra of and M-theory on
Joel Karlsson, Bengt E. W. Nilsson
The squashed seven-sphere operator spectrum is completed by deriving the spectrum of the spin-3/2 operator. The implications of the results for the superm…
Microscopics of de Sitter Entropy from Precision Holography
Nikolay Bobev, Thomas Hertog, Junho Hong +2
We calculate quantum corrections to the entropy of four-dimensional de Sitter space induced by higher-derivative terms in the gravitational action and by one-loop effects. Employin…