Comments on the description of a nonrelativistic spin-1/2 particle in quantum mechanics

D. Farque

В. И. Фущич, A. G. Nikitin, V. A. Salogub

Murray Peshkin

Murray Peshkin

The preceding Comment states that I have assumed the conclusion in my proof from nonrelativistic quantum mechanics that spin-zero particles must be bosons, and that the theory presented is different from standard quantum mechanics. I show here that neither of those statements is true.

Armin Wachter

Stanley A. Bruce

We propose a Hamiltonian for a nonrelativistic spin 1/2 \QTR{it}{free} particle (e.g. an electron) and find that it contains information of its internal degrees of freedom in the rest coordinate system. We comment on the dynamical symmetry associated with the electron \QTR{it}{Zitterbewegung}.