Research

Cosmology

Exact noise kernel for quantum fields in static de Sitter and conformally-flat spacetimes

Validity of the semiclassical approximation during the preheating phase of chaotic inflation

Effects of quantized scalar fields in cosmological spacetimes with big rip singularities

Cosmological horizon modes and linear response in de Sitter space

Study of the preheating phase of chaotic inflation

Short distance and initial state effects in inflation: Stress tensor and decoherence

Attractor states and infrared scaling in deSitter space

One-loop $\lambda \phi^4$ theory in Robertson-Walker spacetimes: adiabatic regularization and analytic approximation

Analytic approximation and an improved method for computing the stress-energy of quantized scalar fields in Robertson-Walker spacetimes