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An Alternative to quintessence
We consider a FRW cosmological model with an exotic fluid known as Chaplygin gas. We show that the resulting evolution of the universe is not in disagreement with the current observation of cosmicExpand
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TWO-POINT FUNCTIONS AND QUANTUM FIELDS IN DE SITTER UNIVERSE
We present a theory of general two-point functions and of generalized free fields in d-dimensional de Sitter space-time which closely parallels the corresponding Minkowskian theory. The usualExpand
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A general construction of conformal field theories from scalar anti-de Sitter quantum field theories
We provide a new general setting for scalar interacting fields on the covering of a ( d+1 )-dimensional AdS spacetime. The formalism is used at first to construct a one-parameter family of fieldExpand
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Analyticity Properties and Thermal Effects for General Quantum Field Theory on de Sitter Space-Time
Abstract:We propose a general framework for quantum field theory on the de Sitter space-time (i.e. for local field theories whose truncated Wightman functions are not required to vanish). ByExpand
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The lifetime of a massive particle in a de Sitter universe
We study particle decay in de Sitter spacetime as given by first-order perturbation theory in an interacting quantum field theory. We show that for fields with masses above a critical mass mc thereExpand
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The de Sitter and anti-de Sitter Sightseeing Tour
While celebrating the 100 anniversary of the discovery of special relativity [1], it may not be inappropriate to open a window on the de Sitter universes, as their importance in contemporary physicsExpand
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Towards a General Theory of Quantized Fields on the Anti-de Sitter Space-Time
Abstract: We propose a general framework for studying quantum field theory on the anti-de-Sitter space-time, based on the assumption of positivity of the spectrum of the possible energy operators. InExpand
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Particle Decays and Stability on the de Sitter Universe
We study particle decay in de Sitter space–time as given by first-order perturbation theory in a Lagrangian interacting quantum field theory. We study in detail the adiabatic limit of theExpand
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CAN THE CHAPLYGIN GAS BE A PLAUSIBLE MODEL FOR DARK ENERGY
In this note two cosmological models representing the flat Friedmann Universe filled with a Chaplygin fluid, with or without dust, are analyzed in terms of the recently proposed "statefinder"Expand
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Physics of relativistic objects in compact binaries: from birth to coalescence
This book provides a comprehensive, authoritative and timely review of the astrophysical approach to the investigation of gravity theories. Particular attention is paid to strong-field tests ofExpand
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