Reduced fidelity in topological quantum phase transitions

Details Reduced fidelity in topological quantum phase transitions Reduced fidelity in topological quantum phase transitions

2009-02-23

arxiv.org/abs/0902.3848v3

Phys. Rev. A 79, 060301(R) (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures; published version

Scientific paper

10.1103/PhysRevA.79.060301

We study the reduced fidelity between local states of lattice systems exhibiting topological order. By exploiting mappings to spin models with classical order, we are able to analytically extract the scaling behavior of the reduced fidelity at the corresponding quantum phase transitions out of the topologically ordered phases. Our results suggest that the reduced fidelity, albeit being a local measure, generically serves as a faithful marker of a topological quantum phase transition.

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