Trace formulas for TBG
Henry Zeng
Abstract
Becker et al. produced a striking trace formula for the sum of fourth powers of generalized magic angles, θ, for the chiral model of twisted bilayer graphene (TBG) with the exact Bistritzer--MacDonald potential: Σ θ4 = 8 π/ 3 . The purpose of this note is to generalize this formula to a larger class of potentials satisfying the symmetries of the model.
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