Published online by Cambridge University Press: 18 January 2024
Implementation of symmetries can significantly enhance the expression power of DMRG and effectively allow us to retain more basis states in the DMRG calculation. This chapter discusses the skills of imposing symmetries, including spin reflection, spatial reflection, continuous U(1) or other symmetries with additive quantum numbers, and non-Abelian SU(2) symmetry, in a DMRG calculation.
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