39 citations · 133 across the 7 of their papers we have counts for
7 papers
Correlators for pseudo Hermitian systems
Yao Bai, Ting-Long Feng, Suro Kim +4
Pseudo-Hermitian system is a class of non-Hermitian system with Hamiltonian satisfying the condition . We develop the in-in and Schwinger Keldysh formalism to c…
Constraining Millicharged dark matter with Gravitational positivity bounds
Suro Kim, Pyungwon Ko
Gravitational positivity bounds provide consistency conditions for effective field theories with gravity. They turn out to be phenomenologically useful by providing lower bounds in…
Perturbative unitarity in quasi-single field inflation
Suro Kim, Toshifumi Noumi, Keito Takeuchi +1
We study implications of perturbative unitarity for quasi-single field inflation with the inflaton and one massive scalar. Analyzing high energy scattering, we show that non-Gaussi…
Effective Lagrangian for Nambu-Goldstone modes in nonequilibrium open systems
Masaru Hongo, Suro Kim, Toshifumi Noumi +1
We develop the effective field theory of diffusive Nambu-Goldstone (NG) modes associated with spontaneous internal symmetry breaking taking place in nonequilibrium open systems. Th…
Heavy Spinning Particles from Signs of Primordial Non-Gaussianities: Beyond the Positivity Bounds
Suro Kim, Toshifumi Noumi, Keito Takeuchi +1
Within the so-called cosmological collider program, imprints of new particles on primordial non-Gaussianities have been studied intensively. In particular, their non-analytic featu…
Dressed Power-law Inflation with Cuscuton
Asuka Ito, Aya Iyonaga, Suro Kim +1
We study dressed inflation with a cuscuton and find a novel exact power-law solution. It is well known that the conventional power-law inflation is inconsistent with the Planck dat…
Effective field theory of time-translational symmetry breaking in nonequilibrium open system
Masaru Hongo, Suro Kim, Toshifumi Noumi +1
We develop the effective field theoretical (EFT) approach to time-translational symmetry breaking of nonequilibrium open systems based on the Schwinger-Keldysh formalism. In the Sc…