4 papers · 1 filter
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…
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…
TCC in the interior of moduli space and its implications for the string landscape and cosmology
Alek Bedroya, Qianshu Lu, Paul Steinhardt
We consider the classical Friedmann-Robertson-Walker solutions that describe a universe undergoing a transition from an accelerating expansion phase in the past to an eternal decel…