Can you write physics papers without harmonic oscillators
and/or two-by-two matrices? If they have been helpful in
constructing your ideas, you are welcome to submit your
paper to the special issue entitled
Einstein, Heisenberg, Schrödinger, Dirac, Yukawa,
and Feynman used harmonic oscillators to develop their
ideas. Is it possible to develop theory of relativity
using harmonic oscillators? Crazy, but Dirac did.
for a story.