TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysCore.4.2.014
TI  - Quantum criticality in many-body parafermion chains
PY  - 2021/05/28
UR  - https://scipost.org/SciPostPhysCore.4.2.014
JF  - SciPost Physics Core
JA  - SciPost Phys. Core
VL  - 4
IS  - 2
SP  - 014
A1  - Lahtinen, Ville
AU  - Mansson, Teresia
AU  - Ardonne, Eddy
AB  - We construct local generalizations of 3-state Potts models with exotic critical points. We analytically show that these are described by non-diagonal modular invariant partition functions of products of $Z_3$ parafermion or $u(1)_6$ conformal field theories (CFTs). These correspond either to non-trivial permutation invariants or block diagonal invariants, that one can understand in terms of anyon condensation. In terms of lattice parafermion operators, the constructed models correspond to parafermion chains with many-body terms. Our construction is based on how the partition function of a CFT depends on symmetry sectors and boundary conditions. This enables to write the partition function corresponding to one modular invariant as a linear combination of another over different sectors and boundary conditions, which translates to a general recipe how to write down a microscopic model, tuned to criticality. We show that the scheme can also be extended to construct critical generalizations of $k$-state clock type models.
ER  -

@Article{10.21468/SciPostPhysCore.4.2.014,
	title={{Quantum criticality in many-body parafermion chains}},
	author={Ville Lahtinen and Teresia Mansson and Eddy Ardonne},
	journal={SciPost Phys. Core},
	volume={4},
	pages={014},
	year={2021},
	publisher={SciPost},
	doi={10.21468/SciPostPhysCore.4.2.014},
	url={https://scipost.org/10.21468/SciPostPhysCore.4.2.014},
}