Quantum critical spin-2 chain with emergent SU(3) symmetry

Chen, Pochung, Xue, Zhi-Long, McCulloch, I. P., Chung, Ming-Chiang, Huang, Chao-Chun and Yip, S. -K. (2015) Quantum critical spin-2 chain with emergent SU(3) symmetry. Physical Review Letters, 114 14: 145301.1-145301.5. doi:10.1103/PhysRevLett.114.145301

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Author Chen, Pochung
Xue, Zhi-Long
McCulloch, I. P.
Chung, Ming-Chiang
Huang, Chao-Chun
Yip, S. -K.
Title Quantum critical spin-2 chain with emergent SU(3) symmetry
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 0031-9007
1079-7114
1092-0145
Publication date 2015-04
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.114.145301
Open Access Status File (Publisher version)
Volume 114
Issue 14
Start page 145301.1
End page 145301.5
Total pages 5
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2016
Language eng
Formatted abstract
We study the quantum critical phase of an SU(2) symmetric spin-2 chain obtained from spin-2 bosons in a one-dimensional lattice. We obtain the scaling of the finite-size energies and entanglement entropy by exact diagonalization and density-matrix renormalization group methods. From the numerical results of the energy spectra, central charge, and scaling dimension we identify the conformal field theory describing the whole critical phase to be the SU(3)1 Wess-Zumino-Witten model. We find that, while the Hamiltonian is only SU(2) invariant, in this critical phase there is an emergent SU(3) symmetry in the thermodynamic limit.
Keyword Optical Lattice
Phase
Boundary
Systems
Physics
Gases
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2016 Collection
 
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