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Spontaneous Inflation and the Origin of the Arrow of Time
Sean M. Carroll, Jennifer Chen
We suggest that spontaneous eternal inflation can provide a natural explanation for the thermodynamic arrow of time, and discuss the underlying assumptions and consequences of this…
The Cosmology of Generalized Modified Gravity Models
Sean M. Carroll, Antonio De Felice, Vikram Duvvuri +3
We consider general curvature-invariant modifications of the Einstein-Hilbert action that become important only in regions of extremely low space-time curvature. We investigate the…
Can we be tricked into thinking that w is less than -1?
Sean M. Carroll, Antonio De Felice, Mark Trodden
Dark energy candidates for which the equation-of-state parameter w is less than -1 violate the dominant energy condition, and are typically unstable. In scalar-tensor theories of g…
Lorentz-Violating Vector Fields Slow the Universe Down
Sean M. Carroll, Eugene A. Lim
We consider the gravitational effects of a single, fixed-norm, Lorentz-violating timelike vector field. In a cosmological background, such a vector field acts to rescale the effect…
TASI Lectures: Introduction to Cosmology
Mark Trodden, Sean M. Carroll
These proceedings summarize lectures that were delivered as part of the 2002 and 2003 Theoretical Advanced Study Institutes in elementary particle physics (TASI) at the University…