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arXiv · 2206.02727

Boson-fermion duality with subsystem symmetry

Weiguang Cao·Masahito Yamazaki·Yunqin Zheng
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Abstract

We explore an exact duality in $(2+1)$d between the fermionization of a bosonic theory with a $\mathbb{Z}_2$ subsystem symmetry and a fermionic theory with a $\mathbb{Z}_2$ subsystem fermion parity symmetry. A typical example is the duality between the fermionization of the plaquette Ising model and the plaquette fermion model. We first revisit the standard boson-fermion duality in $(1+1)$d with a $\mathbb{Z}_2$ 0-from symmetry, presenting in a way generalizable to $(2+1)$d. We proceed to $(2+1)$d with a $\mathbb{Z}_2$ subsystem symmetry and establish the exact duality on the lattice by using the generalized Jordan-Wigner map, with a careful discussion on the mapping of the twist and symmetry sectors. This motivates us to introduce the subsystem Arf invariant, which exhibits a foliation structure.

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Weiguang Cao, Masahito Yamazaki, Yunqin Zheng. 2022-06-06. Boson-fermion duality with subsystem symmetry. https://doi.org/10.1103/physrevb.106.075150

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