56 citations · 214 across the 16 of their papers we have counts for
16 papers
Internal time, test clocks and singularity resolution in dust-filled quantum cosmology
Ian D. Lawrie
The problem of time evolution in quantum cosmology is studied in the context of a dust-filled, spatially flat Friedmann-Robertson-Walker universe. In this model, two versions of th…
Time evolution in quantum cosmology
Ian D. Lawrie
A commonly adopted relational account of time evolution in generally-covariant systems, and more specifically in quantum cosmology, is argued to be unsatisfactory, insofar as it de…
Dissipation due to fermions in inflaton equations of motion
Javier Moreno Almeida, Ian D. Lawrie
According to quantum field theory, the inflaton equation of motion does not have the local form that is generally assumed for cosmological purposes. In particular, earlier investig…
Witnessing Macroscopic Entanglement in a Staggered Magnetic Field
Jenny Hide, Wonmin Son, Ian Lawrie +1
We investigate macroscopic entanglement in an infinite XX spin-1/2 chain with staggered magnetic field, B_l=B+e^{-iπl}b. Using single-site entropy and by constructing an entangleme…
Numerical investigation of friction in inflaton equations of motion
Ian D. Lawrie
The equation of motion for the expectation value of a scalar quantum field does not have the local form that is commonly assumed in studies of inflationary cosmology. We have recen…
Dissipation in equations of motion of scalar fields
Ian D. Lawrie
The methods of non-equilibrium quantum field theory are used to investigate the possibility of representing dissipation in the equation of motion for the expectation value of a sca…