17 papers
Dynamical Localization of Gravity
Aharon Davidson, Philip D. Mannheim
We show that the thin wall limit of the thick domain wall associated with a sine-Gordon soliton in a single non-compactified patch of 5-dimensional spacetime explicitly yields the…
Fourth Order Theories Without Ghosts
Philip D. Mannheim, Aharon Davidson
Using the Dirac constraint method we show that the pure fourth-order Pais-Uhlenbeck oscillator model is free of observable negative norm states. Even though such ghosts do appear w…
Cosmic acceleration and a natural solution to the cosmological constant problem
Philip D. Mannheim
We trace the origin of the cosmological constant problem to the assumption that Newton's constant sets the scale for cosmology. And then we show that once this assumption is re…
Conformal gravity and a natural solution to the cosmological constant problem
Philip D. Mannheim
With attempts to quench the cosmological constant having so far failed, we instead investigate what could be done if is not quenched and actually gets to be as big as eleme…
Curvature, Galactic Dynamics and Cosmic Repulsion
Philip D. Mannheim
We show that a cosmological negative spatial curvature can account for both a recently identified phenomenological imprint of the global Hubble flow on galactic rotation curves and…
The equivalence principle in classical mechanics and quantum mechanics
Philip D. Mannheim
We discuss our understanding of the equivalence principle in both classical mechanics and quantum mechanics. We show that not only does the equivalence principle hold for the traje…