Douglas M. Gingrich
= Douglas M. Gingrich
{c}
{tag=Physicist}
A <particle physicist> who authored a worked treatment of the <Klein paradox> for a spin-zero particle. Solving the <Klein-Gordon equation> at an electrostatic step requires tracking the sign of the charge current, rather than interpreting every transmitted amplitude as an ordinary positive-energy particle. The example connects boundary matching to the appearance of antiparticle and pair-creation interpretations in relativistic quantum theory.<Klein Paradox for Spin-0 Particles by Douglas M. Gingrich>[Equations (4.137)–(4.155) and discussion of signed transmitted current]{ref}