Abstract
We investigate the back reaction of cosmological long wavelength perturbations on the evolution of the Universe. By applying the renormalization group method to a Friedmann-Robertson-Walker universe with long wavelength fluctuations, we demonstrate that the renormalized solution with the back reaction effect is equivalent to that of the separate universe. Then, using the effective Friedmann equation, we show that only the nonadiabatic mode of long wavelength fluctuations affects the expansion law of the spatially averaged universe.
| Original language | English |
|---|---|
| Article number | 084016 |
| Pages (from-to) | 1-5 |
| Number of pages | 5 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 71 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - Apr 15 2005 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)