Developers:FutureTutorials:ED Lattice models

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Quantum Magnetism

Energy Spectrum and


Tower of States

Physical examples (or a subset thereof): - S=1/2 Square lattice AFM (collinear Néel order) - S=1/2 Triangular lattice (noncollinear 120o order) - S=1 bilinear-biquadratic square lattice (Ferroquadrupolar order) - hardcore bosons (superfluid)

Calculate low lying energy spectrum with Lanczos or fulldiag extract total S (if applicable) of each eigenstate. Simple for fulldiag, more involved based on partial Lanczos spectra

Requirements

 Flexible cluster interface, Lattice library redesign