Author pages are created from data sourced from our academic publisher partnerships and public sources.
- Publications
- Influence
BATSE observations of gamma-ray burst spectra. I: Spectral diversity
- J. Matteson, L. Ford, +11 authors P. Lestrade
- Physics
- 10 August 1993
We studied the time-averaged gamma-ray burst spectra accumulated by the spectroscopy detectors of the Burst and Transient Source Experiment. The spectra are described well at low energy by a… Expand
Quantum coherence effects and the second law of thermodynamics
- L. Ford
- Physics
- Proceedings of the Royal Society of London. A…
- 12 December 1978
Negative energy densities and fluxes due to quantum coherence effects in quantum field theories are discussed. Such negative energy fluxes seemingly lead to a breakdown of the second law of… Expand
The quantum interest conjecture
Although quantum field theory allows local negative energy densities and fluxes, it also places severe restrictions upon the magnitude and extent of the negative energy. The restrictions take the… Expand
The unphysical nature of `warp drive'
- M. Pfenning, L. Ford
- Physics
- 13 February 1997
We will apply the quantum-inequality-type restrictions to Alcubierre's warp drive metric on a scale in which a local region of spacetime can be considered `flat'. These are inequalities that restrict… Expand
Gravitational Effects upon Cosmological Phase Transitions
- A. Vilenkin, L. Ford
- Physics
- 15 September 1982
The effects of spacetime curvature upon phase transitions in an expanding universe are investigated. We consider a Robertson-Walker model which is a radiation-dominated universe at early times and… Expand
Restrictions on negative energy density in flat spacetime
In a previous paper, a bound on the negative energy density seen by an arbitrary inertial observer was derived for the free massless, quantized scalar eld in four-dimensional Minkowski spacetime.… Expand
Quantized Gravitational Wave Perturbations in Robertson-Walker Universes
We consider the theory of quantized gravitational wave perturbations in the three types of Robertson-Walker universes. In a gauge analogous to the Coulomb gauge in electrodynamics it is possible to… Expand
Minkowski vacuum stress tensor fluctuations
We study the fluctuations of the stress tensor for a massless scalar field in two- and four-dimensional Minkowski spacetime in the vacuum state. Covariant expressions for the stress tensor… Expand