10 papers
Suppressing Extra-Dimensional Axion Isocurvature Dynamically
Gongjun Choi, Tony Gherghetta
Extra-dimensional QCD axion is well motivated by string compactifications and enjoys enhanced protection against quality-violating effects. If present during inflation, however, it…
Radiative Corrections in Supergravity Models of Inflation
John Ellis, Tony Gherghetta, Kunio Kaneta +2
Supergravity provides the natural supersymmetric framework for early universe cosmology. A broad class of inflationary models in no-scale supergravity yields tree-level predictions…
An Extra-Dimensional Axion in a 5D Warped Orbifold GUT
Gongjun Choi, Tony Gherghetta
We study the QCD axion arising from the 5th component of a bulk gauge field in a five-dimensional warped grand unified theory, and determine the viable range of the axion de…
Effects of Radiative Corrections on Starobinsky Inflation
John Ellis, Tony Gherghetta, Kunio Kaneta +2
We analyze radiative corrections to the Starobinsky model of inflation arising from self-interactions of the inflaton, and from its Yukawa couplings, , to matter fermions, and d…
Holographic phase transitions via thermally-assisted tunneling
Tony Gherghetta, Arpon Paul, Andrey Shkerin
We construct the thermal bounce solution in holographic models that describes first-order phase transitions between the deconfined and confined phases in strongly-coupled gauge the…
Non-invertible Chiral Symmetry and Axions under Electromagnetic Duality
Gongjun Choi, Tony Gherghetta, John Terning
We study the implications of non-invertible chiral symmetry in a four-dimensional U(1) gauge theory coupled to massless fermions with electromagnetic duality. Th…