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Showing 1992Show all
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astro-ph1992
The Spectral Index in the CDM Cosmogony
David H Lyth, Andrew A Liddle
In a recent paper, we suggested that the density fluctuation spectra arising from power-law (or extended) inflation, which are tilted with respect to the Harrison--Zel'dovich spect…
astro-ph1992★ 409 cited
COBE, Gravitational Waves, Inflation and Extended Inflation
David H Lyth, Andrew R Liddle
We analyse the implications for inflationary models of the cosmic microwave background (cmb) anisotropy measured by COBE. Vacuum fluctuations during inflation generate an adiabatic…
hep-th1992★ 14 cited
A Geometrical Approach to Time-Dependent Gauge-Fixing
Jonathan M. Evans, Philip A. Tuckey
When a Hamiltonian system is subject to constraints which depend explicitly on time, difficulties can arise in attempting to reduce the system to its physical phase space. Specific…