2 papers
physics.chem-ph2026
Four-component relativistic calculations in a multiwavelet basis with improved convergence
Jacopo Masotti, Roberto Di Remigio Eikås, Christian Tantardini +1
We revive an approach to solve the Dirac equation originally proposed by Kutzelnigg which makes use of the squared Dirac operator . This approach holds the…
cond-mat.supr-con2026
Quaternionic superconductivity links spinful pairing, topology, and charge- order
Christian Tantardini, Jacopo Masotti, Sabri F. Elatresh +1
We recast spinful superconductivity as a \textit{quaternion field theory}, where a quaternion is a four-component hypercomplex number with units $(\boldsymbol{e}_x,\boldsymbol{e}_y…