期刊
PHYSICAL REVIEW B
卷 82, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.82.012405
关键词
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资金
- NSF [DMR-0803200]
- Yale Center for Quantum Information Physics [DMR-0653377]
- Deutsche Forschungsgemeinschaft [RA 1949/1-1]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0803200] Funding Source: National Science Foundation
In one dimension very general results from conformal field theory and exact calculations for quantum spin chains have established universal scaling properties of the entanglement entropy between two parts of a critical system. Using both analytical and numerical methods, we show that if particle number or spin is conserved, fluctuations in a subsystem obey identical scaling as a function of subsystem size in one dimension. We investigate the effects of boundaries and subleading corrections for critical spin and bosonic chains.
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