164 citations · 381 across the 46 of their papers we have counts for
46 papers
Spinors of Spin-one-half Fields
Kevin Cahill
This paper reviews how a two-state, spin-one-half system transforms under rotations. It then uses that knowledge to explain how momentum-zero, spin-one-half annihilation and creati…
Is the local Lorentz invariance of general relativity implemented by gauge bosons that have their own Yang-Mills-like action?
Kevin Cahill
General relativity with fermions has two independent symmetries: general coordinate invariance and local Lorentz invariance. General coordinate invariance is implemented by the Lev…
Flat Space, Dark Energy, and the Cosmic Microwave Background
Kevin Cahill
This paper reviews some of the results of the Planck collaboration and shows how to compute the distance from the surface of last scattering, the distance from the farthest object…
Zero-point energies, dark matter, and dark energy
Kevin Cahill
A quantum field theory has finite zero-point energy if the sum over all boson modes of the th power of the boson mass equals the sum over all fermion modes of…
Path integrals for awkward actions
David Amdahl, Kevin Cahill
Time derivatives of scalar fields occur quadratically in textbook actions. A simple Legendre transformation turns the lagrangian into a hamiltonian that is quadratic in the momenta…
The eras of radiation, matter, and dark energy: new information from the Planck Collaboration
Kevin Cahill
Data released by the Planck Collaboration in 2015 imply new dates for the era of radiation, the era of matter, and the era of dark energy. The era of radiation ended, and the era o…