Large scale structure introduces two different kinds of errors in the luminosity distance estimates from standardizable candles such as supernovae Ia (SNe) - a Poissonian scatter for each SN and a...
Spinors, Inflation, and Non-Singular Cyclic Cosmologies (2003)
Armendariz-Picon, C., Greene, Patrick B.
We consider toy cosmological models in which a classical, homogeneous, spinor field provides a dominant or sub-dominant contribution to the energy-momentum tensor of a flat Friedmann-Robertson-Walker...
Ahmed, Maqbool, Dodelson, Scott, Greene, Patrick B., Sorkin, Rafael
A variety of observations indicate that the universe is dominated by dark energy with negative pressure, one possibility for which is a cosmological constant. If the dark energy is a cosmological...
Supergravity Inflation Free from Harmful Relics (2002)
Greene, Patrick B., Kadota, Kenji, Murayama, Hitoshi
We present a realistic supergravity inflation model which is free from the overproduction of potentially dangerous relics in cosmology, namely moduli and gravitinos which can lead to the...
Dynamics of Symmetry Breaking and Tachyonic Preheating (2001)
Felder, Gary, García-Bellido, Juan, Greene, Patrick B., Kofman, Lev, Linde, Andrei
Dynamics of Symmetry Breaking and Tachyonic Preheating (2000)
Felder, Gary, Garcia-Bellido, Juan, Greene, Patrick B., Kofman, Lev, Linde, Andrei, Tkachev, Igor
We reconsider the old problem of the dynamics of spontaneous symmetry breaking using 3d lattice simulations, and develop a theory of tachyonic preheating, which occurs due to the spinodal instability...
On the Theory of Fermionic Preheating (2000)
Greene, Patrick B., Kofman, Lev
In inflationary cosmology, the particles constituting the Universe are created after inflation due to their interaction with moving inflaton field(s) in the process of preheating. In the fermionic...
Inflationary Reheating and Fermions (1999)
Coherent oscillations of the inflaton field at the end of inflation can parametrically excite fermions in much the same way that bosons are created in preheating. Although Pauli-blocking prohibits...
Sine-Gordon Parametric Resonance (1998)
Greene, Patrick B., Kofman, Lev, Starobinsky, Alexei A.
We consider the instability of fluctuations in an oscillating scalar field which obeys the Sine-Gordon equation. We present simple closed-form analytic solutions describing the parametric resonance...
Greene, Patrick B., Kofman, Lev
In inflationary cosmology, the particles constituting the Universe are created after inflation in the process of reheating due to their interaction with the oscillating inflaton field. In the bosonic...
The Wesseley-Moser rearrangement of flavylium salts. (1960)
Thesis (Ph. D.)--University College Dublin, 1960.