期刊
PHYSICAL REVIEW B
卷 105, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.105.L081116
关键词
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资金
- Fundacao para a Ciencia e a Tecnologia FCT [SFRH/BD/138806/2018]
- MINECO-Spain [PID2019-109539GB-41]
- Generalitat Valenciana [Prometeo 2017/139]
This study provides numerical evidence that the Haldane phase for antiferromagnetic spin-1 chains can be realized using a Hubbard model at half filling. The noninteracting limit of the proposed model is found to describe a one-dimensional topological insulator, and it is conjectured to be adiabatically connected to the Haldane phase.
The Haldane phase for antiferromagnetic spin-1 chains is a celebrated topological state of matter, featuring gapped excitations and fractional spin-1/2 edge states. Here, we provide numerical evidence that this phase can be realized with a Hubbard model at half filling, where each s = 1 spin is stored in a four-site fermionic structure. We find that the noninteracting limit of our proposed model describes a one-dimensional topological insulator, and we conjecture it to be adiabatically connected to the Haldane phase. Our work suggests a route to build spin-1 networks using Hubbard model quantum simulators.
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