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Semiclassical gravity, decoherence, and the transition from quantum to classical

Grant number: 13/20583-0
Support type:Scholarships in Brazil - Master
Effective date (Start): January 01, 2014
Effective date (End): February 28, 2015
Field of knowledge:Physical Sciences and Mathematics - Physics
Principal Investigator:Andre Gustavo Scagliusi Landulfo
Grantee:Oton Henrique Marcori
Home Institution: Centro de Ciências Naturais e Humanas (CCNH). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil

Abstract

This project aims to study the mathematical and conceptual basis of Quantum Field Theory in Curved Spacetimes (QFTCS) and analyze how the interaction between quantum systems and the gravitational field can lead the former to behave classically. After the study of the general formalism of QFTCS, we will review the environment- induced decoherence programme and the emergence of the classical world from quantum theory using both the density matrix and Wigner function representations. After that, we will use the above formalism in the analysis of the decoherence of the primordial quantum fluctuations in inflationary models and in the decoherence os macroscopic systems interacting with a stochastic gravitational environment. (AU)