Particle-hole-symmetric model for a paired fractional quantum Hall state in a half-filled Landau level. Hutzel, W., McCord, J., J., Raum, P., T., Stern, B., Wang, H., Scarola, V., W., & Peterson, M., R. Physical Review B, 99(4):045126, American Physical Society, 1, 2019. ![Particle-hole-symmetric model for a paired fractional quantum Hall state in a half-filled Landau level [link]](https://bibbase.org/img/filetypes/link.svg "link")
Website doi abstract bibtex 3 downloads The fractional quantum Hall effect (FQHE) observed at half filling of the second Landau level is believed to be caused by a pairing of composite fermions (CFs) captured by the Moore-Read Pfaffian wave function. The generating Hamiltonian for the Moore-Read Pfaffian is a purely three-body model that breaks particle-hole symmetry and lacks other properties, such as dominate two-body repulsive interactions, expected from a physical model of the FQHE. We use exact diagonalization to study the low energy states of a more physical two-body generator model derived from the three-body model. We find that the two-body model exhibits the essential features expected from the Moore-Read Pfaffian: pairing, non-Abelian anyon excitations, and a neutral fermion mode. The model also satisfies constraints expected for a physical model of the FQHE at half-filling because it is: short range, spatially decaying, particle-hole symmetric, and supports a roton mode with a robust spectral gap in the thermodynamic limit. Hence, this two-body model offers a bridge between artificial three-body generator models for paired states and the physical Coulomb interaction and can be used to further explore properties of non-Abelian physics in the FQHE.
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title = {Particle-hole-symmetric model for a paired fractional quantum Hall state in a half-filled Landau level},
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abstract = {The fractional quantum Hall effect (FQHE) observed at half filling of the second Landau level is believed to be caused by a pairing of composite fermions (CFs) captured by the Moore-Read Pfaffian wave function. The generating Hamiltonian for the Moore-Read Pfaffian is a purely three-body model that breaks particle-hole symmetry and lacks other properties, such as dominate two-body repulsive interactions, expected from a physical model of the FQHE. We use exact diagonalization to study the low energy states of a more physical two-body generator model derived from the three-body model. We find that the two-body model exhibits the essential features expected from the Moore-Read Pfaffian: pairing, non-Abelian anyon excitations, and a neutral fermion mode. The model also satisfies constraints expected for a physical model of the FQHE at half-filling because it is: short range, spatially decaying, particle-hole symmetric, and supports a roton mode with a robust spectral gap in the thermodynamic limit. Hence, this two-body model offers a bridge between artificial three-body generator models for paired states and the physical Coulomb interaction and can be used to further explore properties of non-Abelian physics in the FQHE.},
bibtype = {article},
author = {Hutzel, William and McCord, John J. and Raum, P. T. and Stern, Ben and Wang, Hao and Scarola, V. W. and Peterson, Michael R.},
doi = {10.1103/PhysRevB.99.045126},
journal = {Physical Review B},
number = {4}
}
Downloads: 3
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