Abstract
For a 4-dimensional spatially flat Friedmann-Robertson-Walker universe with a scalar field [Formula Presented] potential [Formula Presented] and constant equation of state [Formula Presented] we show that an expanding solution characterized by [Formula Presented] produces the same scalar perturbations as a contracting solution with [Formula Presented] The same symmetry applies to both the dominant and subdominant scalar perturbation modes. This result admits a simple physical interpretation and generalizes to d spacetime dimensions if we define [Formula Presented].
Original language | English (US) |
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Pages (from-to) | 9 |
Number of pages | 1 |
Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
Volume | 70 |
Issue number | 2 |
DOIs | |
State | Published - 2004 |
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)