Klein Paradox for Spin-0 Particles by Douglas M. Gingrich 2026-10-20
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The institutional lecture derives the outgoing branch, boundary amplitudes and signed charge-current balance for a scalar particle at an electrostatic step. Equations 4.142–4.155 distinguish ordinary transmission, evanescence and the negative-kinetic-energy regime; the following discussion interprets the latter through pair creation.
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