Whereas semiclassical gravity is based on the semiclassical Einstein equation with sources
given by the expectation value of the stress-energy tensor of quantum fields, stochastic semi …

Bringing together the key ideas from nonequilibrium statistical mechanics and powerful
methodology from quantum field theory, this 2008 book captures the essence of …

The term'nonclassical states' refers to the quantum states that cannot be produced in the
usual sources of light, such as lasers or lamps, rather than those requiring more …

We study the nonequilibrium evolution of the expectation value of a scalar field in the broken
and unbroken symmetry cases. We find that the particles produced by parametric …

Master equations are commonly employed in cosmology to model the effect of additional
degrees of freedom, treated as an “environment”, onto a given “system”. However, they rely …

We examine from first principles one of the basic assumptions of modern quantum theories
of structure formation in the early Universe, ie, the conditions upon which fluctuations of a …

We continue our earlier investigation of the back reaction problem in semiclassical gravity
with the Schwinger-Keldysh or closed-time-path (CTP) functional formalism using the …

Stochastic semiclassical gravity of the 1990s is a theory naturally evolved from semiclassical
gravity of the 1970s and 1980s. It improves on the semiclassical Einstein equation with …

We develop a general formalism for a nonperturbative treatment of harmonic-oscillator
particle detectors in relativistic quantum field theory using continuous-variable techniques …

Despite being created through a fundamentally quantum-mechanical process, cosmological
structures have not yet revealed any sign of genuine quantum correlations. Among the …