177 citations · 633 across the 31 of their papers we have counts for
9 papers · 1 filter
Ground-state degeneracy of twisted sectors of Conway Moonshine SCFT
Alissa Furet, Theo Johnson-Freyd
We calculate the ground state degeneracies of all twisted sectors in the "Conway Moonshine'' holomorphic SCFT . We find that almost all sectors have ground states of…
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…
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…
"A combinatorial universal -product" is incorrect
Theo Johnson-Freyd
A very short note, explaining the error in the original paper, which renders its central result incorrect.
Poisson AKSZ theories and their quantizations
Theo Johnson-Freyd
We generalize the AKSZ construction of topological field theories to allow the target manifolds to have possibly-degenerate (homotopy) Poisson structures. Classical AKSZ theories,…
Homological perturbation theory for nonperturbative integrals
Theo Johnson-Freyd
We use the homological perturbation lemma to produce explicit formulas computing the class in the twisted de Rham complex represented by an arbitrary polynomial. This is a non-asym…
How to derive Feynman diagrams for finite-dimensional integrals directly from the BV formalism
Owen Gwilliam, Theo Johnson-Freyd
The Batalin-Vilkovisky formalism in quantum field theory was originally invented to address the difficult problem of finding diagrammatic descriptions of oscillating integrals with…
On the coordinate (in)dependence of the formal path integral
Theo Johnson-Freyd
When path integrals are discussed in quantum field theory, it is almost always assumed that the fields take values in a vector bundle. When the fields are instead valued in a possi…
Feynman-diagrammatic description of the asymptotics of the time evolution operator in quantum mechanics
Theo Johnson-Freyd
We describe the "Feynman diagram" approach to nonrelativistic quantum mechanics on R^n, with magnetic and potential terms. In particular, for each classical path γconnecting points…