581 citations · 5.9k across the 106 of their papers we have counts for
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Tracking quintessence and k-essence in a general cosmological background
Rupam Das, Thomas W. Kephart, Robert J. Scherrer
We derive conditions for stable tracker solutions for both quintessence and k-essence in a general cosmological background, H^2 \propto f(ρ). We find that tracker solutions are pos…
Phantom Dark Energy Models with Negative Kinetic Term
Jens Kujat, Robert J. Scherrer, A. A. Sen
We examine phantom dark energy models derived from a scalar field with a negative kinetic term for which V(phi) approaches infinity asymptotically. All such models can be divided i…
Classical Cancellation of the Cosmological Constant Re-Considered
Stephen M. Barr, Siew-Phang Ng, Robert J. Scherrer
We revisit a scenario in which the cosmological constant is cancelled by the potential energy of a slowly evolving scalar field, or "cosmon". The cosmon's evolution is tied to the…