536 citations · 1.2k across the 35 of their papers we have counts for
16 papers · 1 filter
Satellite Test of the Equivalence Principle as a Probe of Modified Newtonian Dynamics
Jonas P. Pereira, James M. Overduin, Alexander J. Poyneer
The proposed Satellite Test of the Equivalence Principle (STEP) will detect possible violations of the Weak Equivalence Principle by measuring relative accelerations between test m…
Supernova constraints on higher-dimensional cosmology with a phantom field
James Overduin, Nathan Prins, Joohan Lee
We use observational data on the magnitude-redshift relation for Type Ia supernovae together with constraints on the ages of the oldest stars to rule out a higher-dimensional exten…
Waves and causality in higher dimensions
Paul S. Wesson, James M. Overduin
We give a new, wave-like solution of the field equations of five-dimensional relativity. In ordinary three-dimensional space, the waves resemble de Broglie or matter waves, whose p…
Spacetime, Spin and Gravity Probe B
James M. Overduin
It is more important than ever to push experimental tests of gravitational theory to the limits of existing technology in both range and sensitivity. This brief review focuses on s…
STEP and fundamental physics
James Overduin, Francis Everitt, Paul Worden +1
The Satellite Test of the Equivalence Principle (STEP) will advance experimental limits on violations of Einstein's Equivalence Principle from their present sensitivity of 2 parts…
The Scalar Field Source in Kaluza-Klein Theory
Paul S. Wesson, James M. Overduin
To better understand the scalar field typical of higher-dimensional extensions of general relativity, we analyse three classes of solutions. In all, the field equation for the extr…
Expanded solar-system limits on violations of the equivalence principle
James Overduin, Jack Mitcham, Zoey Warecki
Most attempts to unify general relativity with the standard model of particle physics predict violations of the equivalence principle associated in some way with the composition of…
Wave Mechanics and the Fifth Dimension
Paul S. Wesson, James M. Overduin
Replacing 4D Minkowski space by 5D canonical space leads to a clearer derivation of the main features of wave mechanics, including the wave function and the velocity of de Broglie…
A Scalar Field and the Einstein Vacuum in Modern Kaluza-Klein Theory
Paul S. Wesson, James M. Overduin
Five-dimensional relativity as an extension of general relativity has field equations that simplify considerably given the adoption of a new gauge. The result is a scalar field gov…
The Science Case for STEP
James Overduin, Francis Everitt, John Mester +1
STEP (the Satellite Test of the Equivalence Principle) will advance experimental limits on violations of Einstein's equivalence principle (EP) from their present sensitivity of 2 p…
Leopold Halpern and the generalization of general relativity
James M. Overduin, Hans S. Plendl
Leopold Halpern, who was a close associate of both Erwin Schroedinger and Paul Dirac before making his own mark as a theoretical physicist of the first rank, died in Tallahassee, F…
Finite cosmology and a CMB cold spot
R. J. Adler, J. D. Bjorken, J. M. Overduin
The standard cosmological model posits a spatially flat universe of infinite extent. However, no observation, even in principle, could verify that the matter extends to infinity. I…
The nearly flat universe
R. J. Adler, J. M. Overduin
We study here what it means for the Universe to be nearly flat, as opposed to exactly flat. We give three definitions of nearly flat, based on density, geometry and dynamics; all t…
Astrophysical Implications of Higher-Dimensional Gravity
Tomas Liko, James M. Overduin, Paul S. Wesson
We review the implications of modern higher-dimensional theories of gravity for astrophysics and cosmology. In particular, we discuss the latest developments of space-time-matter t…
Dynamics of a Generalized Cosmological Scalar-Tensor Theory
T. Fukui, J. M. Overduin
A generalized scalar-tensor theory is investigated whose cosmological term depends on both a scalar field and its time derivative. A correspondence with solutions of five-dimension…
On the detectability of quantum spacetime foam with gravitational-wave interferometers
Ronald J. Adler, Ilya M. Nemenman, James M. Overduin +1
We discuss a recent provocative suggestion by Amelino-Camelia and others that classical spacetime may break down into ``quantum foam'' on distance scales many orders of magnitude l…