52 citations · 71 across the 5 of their papers we have counts for
5 papers
Propagator positivity bounds for cosmological correlators
Mang Hei Gordon Lee, Scott Melville
Using unitarity and causality, we derive an infinite tower of two-sided positivity bounds on the effective field theory coefficients which describe the propagation of heavy fields…
A de Sitter S-matrix from amputated cosmological correlators
Scott Melville, Guilherme L. Pimentel
Extending scattering to states with unphysical mass values (particles ``off their mass shell'') has been instrumental in developing modern amplitude technology for Minkowski spacet…
Causality and quasi-normal modes in the GREFT
Scott Melville
The General Relativity Effective Field Theory (GREFT) introduces higher-derivative interactions to parameterise the gravitational effects of massive degrees of freedom which are to…
A de Sitter -matrix for the masses
Scott Melville, Guilherme L. Pimentel
We define an -matrix for massive scalar fields on a fixed de Sitter spacetime, in the expanding patch co-ordinates relevant for early Universe cosmology. It enjoys many of the s…
Pressure-anisotropy-driven microturbulence and magnetic-field evolution in shearing, collisionless plasma
S. Melville, A. A. Schekochihin, M. W. Kunz
The nonlinear state of a high-beta collisionless plasma is investigated when an imposed linear shear amplifies or diminishes a uniform magnetic field, driving pressure anisotropies…