42 citations · 274 across the 22 of their papers we have counts for
22 papers
Exact Solutions for Compactly Supported Parabolic and Landau Quantum Barriers
Peter Collas, David Klein
We derive exact solutions to the one-dimensional Schrödinger equation for compact support parabolic and hyperbolic secant potential barriers, along with combinations of these types…
Polar Jet Stream Fluctuations in an Energy Balance Model
Cord Perillo, David Klein, Rabia Djellouli
We investigate the effect of increased longwave radiative forcing (a proxy for increased greenhouse gas concentration) on the zonally averaged location of the eddy-driven jet strea…
The Dirac equation in general relativity, a guide for calculations
Peter Collas, David Klein
In these informal lecture notes we outline different approaches used in doing calculations involving the Dirac equation in curved spacetime. We have tried to clarify the subject by…
Dirac particles in a gravitational shock wave
Peter Collas, David Klein
Using the Newman-Penrose formalism we calculate the positive energy momentum eigenstates of the Dirac equation for a plane polarized grav- itational wave pulse. We then consider Di…
Pre-big bang geometric extensions of inflationary cosmologies
David Klein, Jake Reschke
Robertson-Walker spacetimes within a large class are geometrically extended to larger cosmologies that include spacetime points with zero and negative cosmological times. In the ex…
Velocity addition formulas in Robertson-Walker spacetimes
David Klein, Jake Reschke
Universal velocity addition formulas analogous to the well-known formula in special relativity are found for four geometrically defined relative velocities in a large class of Robe…