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New #openaccess publication #SciPost #Physics #Codebases
Pymablock: An algorithm and a package for quasi-degenerate perturbation theory
Isidora Araya Day, Sebastian Miles, Hugo K. Kerstens, Daniel Varjas, Anton R. Akhmerov
Paper:
SciPost Phys. Codebases 50 (2025)
https://scipost.org/SciPostPhysCodeb.50
Pymablock v2.1:
SciPost Phys. Codebases 50-r2.1 (2025)
https://scipost.org/SciPostPhysCodeb.50-r2.1
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> Our goal is to construct an effective Hamiltonian whose only matrix elements are those in a binary mask, which, without loss of generality, we choose to be a smiley face
Indeed