Voltar
Artigo Acesso aberto Revisado por pares
BIBTEX RIS

Turning big bang into big bounce: II. Quantum dynamics

2010; IOP Publishing; Volume: 27; Issue: 22 Linguagem: Inglês

10.1088/0264-9381/27/22/225018

ISSN

1361-6382

Autores

Przemysław Małkiewicz, Włodzimierz Piechocki,

Tópico(s)

Cosmology and Gravitation Theories

Resumo

We analyze the big bounce transition of the quantum Friedmann–Robertson–Walker model in the setting of the nonstandard loop quantum cosmology (LQC). Elementary observables are used to quantize composite observables. The spectrum of the energy density operator is bounded and continuous. The spectrum of the volume operator is bounded from below and discrete. It has equally distant levels defining a quantum of the volume. The discreteness may imply a foamy structure of spacetime at a semiclassical level which may be detected in astro–cosmo observations. The nonstandard LQC method has a free parameter that should be fixed in some way to specify the big bounce transition.

Referência(s)