54 citations · 64 across the 5 of their papers we have counts for
5 papers
Backreactions in Superinflationary Cosmologies
Z. Lalak, R. Poppe
We examine Jordan-Brans-Dicke theories with a linear potential for the scalar field by means of a stochastic approach. The backreaction of the scalar field fluctuations on the clas…
Scalar field fluctuations in Pre-Big-Bang Cosmologies
Z. Lalak, R. Poppe
Jordan-Brans-Dicke theories with a linearized potential for the scalar field are investigated in the framework of the stochastic approach. The fluctuations of this field are examin…
String Kaluza-Klein cosmologies with RR-fields
R. Poppe, S. Schwager
We construct 4-dimensional cosmological FRW--models by compactifying a black 5-brane solution of type IIB supergravity, which carries both magnetic NS-NS-charge and RR-charge. The…
Decoherence in Pre-Big-Bang Cosmology
Andre' Lukas, Rudolf Poppe
We analyze the quantum cosmology of the simplest pre--big--bang model without dilaton potential. In addition to the minisuperspace variables we include inhomogeneous dilaton fluctu…
Quantum Inflation?
Zygmunt Lalak, Rudolf Poppe
We consider curved space quantum corrections to the equations of motion of the inflaton field in the early Universe. Using the stochastic formalism in phase space, we demonstrate t…