107 citations · 422 across the 12 of their papers we have counts for
12 papers
Non-Gaussianities in the Extended EFT of Inflation
Amjad Ashoorioon, Ghazal Geshnizjani, Hyung J. Kim
In earlier works, we studied the validity of Extended Effective Field Theory of Inflation (EEFToI) in the regime where initial conditions are set with dispersion relations $ω^2 \pr…
Spin and mass currents near a moving magnetic obstacle in a two-component Bose-Einstein condensate
Jong Heum Jung, Hyung Jin Kim, Y. Shin
We study the spatial distributions of the spin and mass currents generated by a moving Gaussian magnetic obstacle in a symmetric, two-component Bose-Einstein condensate in two dime…
Extended Effective Field Theory of Inflation
Amjad Ashoorioon, Roberto Casadio, Michele Cicoli +2
We present a general framework where the effective field theory of single field inflation is extended by the inclusion of operators with mass dimension 3 and 4 in the unitary gauge…
Cuscuton Bounce
Supranta S. Boruah, Hyung J. Kim, Michael Rouben +1
In general relativity producing a regular bounce entails violation of Null Energy Condition for a dynamical source in the model. That generically indicates existence of ghosts or o…
Theory of Cosmological Perturbations with Cuscuton
Supranta S. Boruah, Hyung J. Kim, Ghazal Geshnizjani
This paper presents the first derivation of the quadratic action for curvature perturbations, , within the framework of cuscuton gravity. We study the scalar cosmological pertur…
Getting Super-Excited with Modified Dispersion Relations
Amjad Ashoorioon, Roberto Casadio, Ghazal Geshnizjani +1
We demonstrate that in some regions of parameter space, modified dispersion relations can lead to highly populated excited states, which we dub as "super-excited" states. In order…