Marco Baldi
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Research Interests
Marco Baldi has a total of 2 co-authors. Here are the top co-authors by number of shared publications:
- Fabio Finelli
INAF – Osservatorio di Astrofisica e Scienza dello Spazio di Bologna
1 shared publication - Sabino Matarrese
Università degli Studi di Padova
1 shared publication
Latest Publications
- 6 October 2005
- Published by American Physical Society (APS) in Physical Review D
- Vol. 72 (8) , 083504
Inflation with violation of the null energy condition
Inflation may have been driven by a component which violated the Null-Energy Condition, thereby leading to super inflation. We provide the formalism to study cosmological perturbations when such a component is described by a scalar field with arbitrary Lagrangian. Since the background curvature grows with time, gravitational waves always have a blue spectrum. We apply our formalism to the case of phantom inflation with an exponential potential (whose polelike inflationary stage is an attractor for inhomogeneous cosmological models for any value of the potential slope) as an example. We finally compare the predictions of super inflation with those of standard inflation stressing the role of gravitational waves.
- 6 October 2005
- Published by American Physical Society (APS) in Physical Review D
- Vol. 72 (8) , 083504
Inflation with violation of the null energy condition
Inflation may have been driven by a component which violated the Null-Energy Condition, thereby leading to super inflation. We provide the formalism to study cosmological perturbations when such a component is described by a scalar field with arbitrary Lagrangian. Since the background curvature grows with time, gravitational waves always have a blue spectrum. We apply our formalism to the case of phantom inflation with an exponential potential (whose polelike inflationary stage is an attractor for inhomogeneous cosmological models for any value of the potential slope) as an example. We finally compare the predictions of super inflation with those of standard inflation stressing the role of gravitational waves.