4 papers
Holographic Constraints on the String Landscape
Alek Bedroya, Paul J. Steinhardt
We show that holography imposes strong and general constraints on scalar field potentials in the string landscape, determined by the asymptotic structure of the underlying spacetim…
Holography vs. Scale Separation
Alek Bedroya, Paul J. Steinhardt
In this work, we point out a contradiction between holography and scale-separated AdS (i.e. parametrically large mass gap) in string theory, making the standard assumption that the…
Instant Folded Strings, Dark Energy and a Cyclic Bouncing Universe
Nissan Itzhaki, Uri Peleg, Paul J. Steinhardt
We present a wholly self-consistent, complete cyclic bouncing cosmology based on components drawn from string theory and constructed in a way that is under perturbative control thr…
A species scale-driven breakdown of effective field theory in time-dependent string backgrounds
Alek Bedroya, Hayden Lee, Paul Steinhardt
We present a novel way in which effective field theory (EFT) can break down in cosmological string backgrounds depending on the behavior of the quantum gravity cutoff in infinite d…