Derives asymptotic real-space decay of flat-band projectors: exponential with algebraic prefactor for linearly independent CLS, compact for orthogonal limit, and power-law for singular limit with diverging localization length.
Mielke, Stability of ferromagnetism in hubbard models with degenerate single-particle ground states, Journal of Physics A: Mathematical and General32, 8411 (1999)
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Real space decay of flat band projectors from compact localized states
Derives asymptotic real-space decay of flat-band projectors: exponential with algebraic prefactor for linearly independent CLS, compact for orthogonal limit, and power-law for singular limit with diverging localization length.