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hep-th2000
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…
hep-th2000
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…