This review is concerned with the motion of a point scalar charge, a point electric charge,
and a point mass in a specified background spacetime. In each of the three cases the …

Over the past one hundred years, Brownian motion theory has contributed substantially to
our understanding of various microscopic phenomena. Originally proposed as a …

A bstract We present a formalism for computing classically measurable quantities directly
from on-shell quantum scattering amplitudes. We discuss the ingredients needed for …

A bstract We employ scattering amplitudes in curved space to model the dynamics of a light
probe particle with mass m orbiting in the background spacetime induced by a heavy …

The self-force expansion allows the study of deviations from geodesic motion due to the
emission of radiation and its consequent back-reaction. We investigate this scheme within …

A bstract Quantum Electrodynamics (QED) serves as a useful toy model for classical
observables in gravitational two-body systems with reduced complexity due to the linearity of …

Recently Danielson, Satishchandran, and Wald (DSW) have shown that quantum
superpositions held outside of Killing horizons will decohere at a steady rate. This occurs …

Abstract We review Unruh–DeWitt detectors and other models of detector–field interaction in
a relativistic quantum field theory setting as a tool for extracting detector–detector, field–field …

In this work we consider the effects of gravitons and their fluctuations on the dynamics of two
masses using the Feynman-Vernon influence functional formalism, applied earlier to …

I review the problem of motion for small bodies in general relativity, with an emphasis on
developing a self-consistent treatment of the gravitational self-force. An analysis of the …