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7 papers · 2 filters
Decoherence induced by long wavelength gravitons
V. A. De Lorenci, L. H. Ford
We discuss how a background bath of gravitons can induce decoherence of quantum systems. The mechanism is dephasing, the loss of phase coherence due to quantum geometry fluctuation…
Einstein's Equations and a Cosmology with Finite Matter
L. Clavelli, Gary R. Goldstein
We discuss various space-time metrics which are compatible with Einstein's equations and a previously suggested cosmology with a finite total mass. In this alternative cosmology th…
Quantum inequality in spacetimes with small curvature
Eleni-Alexandra Kontou, Ken D. Olum
Quantum inequalities bound the extent to which weighted time averages of the renormalized energy density of a quantum field can be negative. They have mostly been proved in flat sp…
Probability distributions for quantum stress tensors in two and four dimensions
Christopher J. Fewster, L. H. Ford, Thomas A. Roman
The probability distributions for the smeared energy densities of quantum fields, in the two and four-dimensional Minkowski vacuum are discussed. These distributions share the prop…
Quantum inequality for a scalar field with a background potential
Eleni-Alexandra Kontou, Ken D. Olum
Quantum inequalities are bounds on negative time-averages of the energy density of a quantum field. They can be used to rule out exotic spacetimes in general relativity. We study q…
An Analog Model for Light Propagation in Semiclassical Gravity
C. H. G. Bessa, V. A. De Lorenci, L. H. Ford
We treat a model based upon nonlinear optics for the semiclassical gravitational effects of quantum fields upon light propagation. Our model uses a nonlinear material with a nonzer…