期刊
PHYSICAL REVIEW LETTERS
卷 108, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.126805
关键词
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资金
- U.S. DOE Office of Basic Energy Sciences [DE-FG02-06ER46305]
- NSFC of China [10904130]
- U.S. DOE [DE-AC02-05CH11231]
- U.S. NSF [NSFPHY05-51164]
- State Key Program for Basic Researches of China [2006CB921802, 2009CB929504]
Inspired by the recent theoretical discovery of robust fractional topological phases without a magnetic field, we search for the non-Abelian quantum Hall effect in lattice models with topological flat bands. Through extensive numerical studies on the Haldane model with three-body hard-core bosons loaded into a topological flat band, we find convincing numerical evidence of a stable nu = 1 bosonic non-Abelian quantum Hall effect, with the characteristic threefold quasidegeneracy of ground states on a torus, a quantized Chern number, and a robust spectrum gap. Moreover, the spectrum for two-quasihole states also shows a finite energy gap, with the number of states in the lower-energy sector satisfying the same counting rule as the Moore-Read Pfaffian state.
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