PIRSA:14020118

Video URL

https://pirsa.org/14020118

A unification of symmetric Z2 spin liquids on kagome lattice

Lu, Y. (2014). A unification of symmetric Z2 spin liquids on kagome lattice. Perimeter Institute for Theoretical Physics. https://pirsa.org/14020118

Lu, Yuan-Ming. A unification of symmetric Z2 spin liquids on kagome lattice. Perimeter Institute for Theoretical Physics, Feb. 14, 2014, https://pirsa.org/14020118 

          @misc{ scivideos_PIRSA:14020118,
            doi = {10.48660/14020118},
            url = {https://pirsa.org/14020118},
            author = {Lu, Yuan-Ming},
            keywords = {},
            language = {en},
            title = {A unification of symmetric Z2 spin liquids on kagome lattice},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2014},
            month = {feb},
            note = {PIRSA:14020118 see, \url{https://scivideos.org/index.php/pirsa/14020118}}
          }

Yuan-Ming Lu

Talk numberPIRSA:14020118
DOI10.48660/14020118
Source RepositoryPIRSA
Collection
Talk Type Conference

Abstract

While there is mounting numerical evidence for a gapped Z2 spin liquid in the kagome Heisenberg model, a complete characterization of this topological phase remains to be accomplished. A defining property, the projective symmetry group (PSG) which fixes how the emergent excitations of the spin liquid phase transform under symmetry, remains to be determined. Following a Chern-Simons field theory, we show how PSG determines measurable properties of a Z2 spin liquid, such as the existence of symmetry protected gapless edge states. This fact enables us to unify two distinct types of projected wavefunctions for Z2 spin liquids: the Schwinger-boson states and the fermionic spinon states. We also provide concrete predictions for identifying the spin liquid ground state on the kagome lattice.