3 papers
hep-th2026
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…
hep-th2026
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…
hep-th2024
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^…