
arXiv: 1601.03751
A charged entanglement entropy is a new measure which probes quantum entanglement between different charge sectors. We study symmetry protected topological (SPT) phases in 2+1 dimensional space-time by using this charged entanglement entropy. SPT phases are short range entangled states without topological order and hence cannot be detected by the topological entanglement entropy. We demonstrate that the universal part of the charged entanglement entropy is non-zero for non-trivial SPT phases and therefore it is a useful measure to detect short range entangled topological phases. We also discuss that the classification of SPT phases based on the charged topological entanglement entropy is related to that of the braiding statistics of quasiparticles.
14 pages, Explanation added in section 3
High Energy Physics - Theory, Condensed Matter - Strongly Correlated Electrons, Quantum Physics, Strongly Correlated Electrons (cond-mat.str-el), High Energy Physics - Theory (hep-th), FOS: Physical sciences, Quantum Physics (quant-ph)
High Energy Physics - Theory, Condensed Matter - Strongly Correlated Electrons, Quantum Physics, Strongly Correlated Electrons (cond-mat.str-el), High Energy Physics - Theory (hep-th), FOS: Physical sciences, Quantum Physics (quant-ph)
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 15 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Top 10% | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Average | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Top 10% |
