68 citations · 765 across the 90 of their papers we have counts for
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Rest frame vacua of massive Klein-Gordon fields on spatially flat FLRW spacetimes
Ion I. Cotaescu
We propose a method of projecting the quantum states from a state space of a given geometry into another state space generated by a different geometry, taking care on the correct n…
Rest frame vacuum of the Dirac field on spatially flat FLRW spacetimes
Ion I. Cotaescu
In quantum theory of the free Dirac field on spatially flat FLRW spacetimes we introduce a new type of vacuum able to separate the positive and negative frequencies in the rest fra…
Aharonov-Bohm rings in de Sitter expanding universe
Ion I. Cotaescu
The -dimensional Dirac equation of the fermions moving in ideal Aharonov-Bohm rings in the de Sitter expanding universe is used for deriving the exact expressions of the gen…
First order QED effects on a spatially flat FLRW spacetime with a Milne-type scale factor
Ion I. Cotaescu, Diana Popescu
The quantum electrodynamics (QED) on a spatially flat -dimensional Friedmann-Lema\^ itre-Robertson-Walker (FLRW) spacetime with a Milne-type scale factor is outlined focusin…
Integral representation of the scalar propagators on the de Sitter expanding universe
Ion I. Cotaescu, Ion Cotaescu
A new type of integral representation is proposed for the propagators of the massive Klein-Gordon field minimally coupled to the gravity of the de Sitter expanding universe. This r…