15 citations · 37 across the 4 of their papers we have counts for
4 papers
The Cosmological Constant and Lorentz Invariance of the Vacuum State
Jurjen F. Koksma, Tomislav Prokopec
One hope to solve the cosmological constant problem is to identify a symmetry principle, based on which the cosmological constant can be reduced either to zero, or to a tiny value.…
Decoherence in an Interacting Quantum Field Theory: Thermal Case
Jurjen F. Koksma, Tomislav Prokopec, Michael G. Schmidt
We study the decoherence of a renormalised quantum field theoretical system. We consider our novel correlator approach to decoherence where entropy is generated by neglecting obser…
A Causal Alternative to Feynman's Propagator
Jurjen F. Koksma, W. Westra
The Feynman propagator used in the conventional in-out formalism in quantum field theory is not a causal propagator as wave packets are propagated virtually instantaneously outside…
The Scalar Field Kernel in Cosmological Spaces
Jurjen F. Koksma, Tomislav Prokopec, Gerasimos I. Rigopoulos
We construct the quantum mechanical evolution operator in the Functional Schrodinger picture - the kernel - for a scalar field in spatially homogeneous FLRW spacetimes when the fie…