Physics Asked on April 21, 2021
Is there an analog of the Jordan-Wigner transformation between fermion algebra on a circle and a Pauli algebra? For example, the continuum analog of bosonization of "compact boson $leftrightarrow$ Dirac fermion" there’s an analog of the bosonization map, say on a Euclidean cylinder.
As a reminder, the compact boson is a bosonic action where the target space is a circle $S^1$ rather than the usual $mathbb{R}$. As such, when the compact boson is put on a spacetime with nontrivial topology, there can be ‘winding’/’instanton’ modes where there’s winding of the target-space circle around a non-contractible spacetime loop.
The bosonization map in the cylindrical case is with antiperiodic (NS) boundary conditions on the Dirac fermion, there’s an equivalence to the bosonic field theory. Putting periodic (R) conditions on the fermion conditions also creates a map, except that the fermionic partition function maps to the bosonic one where the modes with odd winding around the circle contribute to the partition function with an extra minus sign. This allows one to isolate the even (odd) winding boson sectors via adding (subtracting) the two partition functions.
Extra details:
I was wondering if there was such a unified description relating spin structure, a fermionic algebra on a circular spin chain of $N$ sites, and some bosonic algebra. And, if they could be tied together with the standard Jordan-Wigner map. (I’ve heard people say things along these lines but haven’t found any resource that ties these all together.)
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