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math-ph2015
Heisenberg-picture quantum field theory
Theo Johnson-Freyd
What we should mean by "Heisenberg-picture quantum field theory"? Atiyah--Segal-type axioms do a good job of capturing the "Schrödinger picture": these axioms define a "-dimensi…
math-ph2015★ 12 cited
Spin, statistics, orientations, unitarity
Theo Johnson-Freyd
A topological quantum field theory is Hermitian if it is both oriented and complex-valued, and orientation-reversal agrees with complex-conjugation. A field theory satisfies spin-s…