197 citations · 1.4k across the 36 of their papers we have counts for
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astro-ph.CO2012★ 55 cited
Particle creation and particle number in an expanding universe
Leonard Parker
I describe the logical basis of the method that I developed in 1962 and 1963 to define a quantum operator corresponding to the observable particle number of a quantized free scalar…
astro-ph.CO2012★ 17 cited
Enhanced local-type inflationary trispectrum from a non-vacuum initial state
Ivan Agullo, Jose Navarro-Salas, Leonard Parker
We compute the primordial trispectrum for curvature perturbations produced during cosmic inflation in models with standard kinetic terms, when the initial quantum state is not nece…