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 Feb 15 awarded Yearling Jan 23 awarded Nice Question Jan 16 comment Is (rest) mass quantized? Could mass not be considered an eigenvalue of the Dirac operator in the Dirac equation? Jan 16 asked Crystal momentum and the vector potential Jan 15 revised Is there any uncertainty between mass and proper length or time? changed tags Jan 15 revised Can path integrals be used to understand entanglement? added some more tags Jan 15 asked Can path integrals be used to understand entanglement? Jan 15 asked Is there any uncertainty between mass and proper length or time? Feb 29 revised Formulation of Transformation optics using a Material Manifold added 24 characters in body Feb 29 revised Formulation of Transformation optics using a Material Manifold explanation of the possible use of geometric algebra Feb 29 awarded Editor Feb 29 revised Formulation of Transformation optics using a Material Manifold explanation of the possible use of geometric algebra Feb 29 comment Formulation of Transformation optics using a Material Manifold Well, the latter link is far more applicable to a material manifold. That one is not on geometric algebra per se but on EM propagation in arbitrary materials. They use differential forms extensively, but no mention of geometric algebra. I figured the geometric algebra formulation could--if nothing else--be useful for ease of notation. Feb 23 awarded Scholar Feb 23 accepted How does Bloch's theorem generalize to a finite sized crystal? Feb 23 comment How does Bloch's theorem generalize to a finite sized crystal? Ok then, I guess that's all there is to it. I checked the first answer only because it was more directed to my question (rather than the comment.) I appreciate your answer too and voted it up. Feb 23 comment How does Bloch's theorem generalize to a finite sized crystal? I suppose I am mainly interested in what kind of how quasimomentum would be allowed in such a system. Would it vary with position on the lattice? Feb 22 awarded Supporter Feb 21 awarded Teacher Feb 20 comment How does Bloch's theorem generalize to a finite sized crystal? Then at what point does Bloch's theorem stop applying? How many unit cells is "enough" for Bloch's theorem to apply?