9 citations · 16 across the 8 of their papers we have counts for
9 papers
UV/IR scale dependence in a four-derivative scalar field theory
Bob Holdom
An analog of the standard renormalization procedure may be useful for four-derivative theories, and we illustrate it with the four-derivative scalar field theory in the lim…
Superselected ghost theory: entangled pairs
Bob Holdom
The superselection-rule approach to ghost theories is extended to theories with a nonreal spectrum containing a complex-conjugate pair of poles on the physical sheet. The two excit…
Superselected ghost theory: perturbation theory
Bob Holdom
A superselection rule based on an exact ghost parity can endow a ghost QFT with a probability interpretation. However, this ghost parity is not respected at finite order in the sta…
Superselected ghost theory: real spectrum
Bob Holdom
Quantum field theories with ghosts can be unitary and perturbatively stable, yet the negative-norm states of their conserved indefinite inner product obstruct a probabilistic inter…
Negative mass singularities mimicking dark energy
Bob Holdom
One or two negative mass singularities are found to occur in static inhomogeneous spatially closed solutions to the Einstein equations. The singularities produce a positive Komar m…
Making sense of ghosts
Bob Holdom
Ghosts have been a stumbling block in the development of a UV complete quantum field theory for gravity. We discuss how difficulties associated with ghosts are overcome in the cont…