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20212026
most citedGround States of Heisenberg Spin Clusters from Projected Hartree-Fock Theory

7 citations · 23 across the 14 of their papers we have counts for

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quant-ph2026

Kramers pseudospin and the quantum number proposed for the many-electron Dirac?Coulomb Hamiltonian

Shadan Ghassemi Tabrizi

The square of a sum of single-electron time reversals has been proposed as a conserved quantity with an integer eigenvalue spectrum for the many-electron Dirac-Coulomb Hamiltonian…

cond-mat.str-el2026

Systematic extinctions in inelastic neutron scattering from molecular spin clusters

Shadan Ghassemi Tabrizi

Inelastic neutron scattering on a single crystal resolves how the intensity of a magnetic transition of a molecular spin cluster varies with the momentum-transfer vector $\mathbf{Q…

cond-mat.str-el2026

Hidden symmetry at the diabolical points of a biaxial spin

Shadan Ghassemi Tabrizi

In a rotated frame the biaxial spin Hamiltonian is a finite tight-binding chain whose hopping amplitudes are tuned by the applied fiel…

cond-mat.str-el2026

GPU-accelerated finite-temperature Lanczos method for Heisenberg spin systems with non-Abelian permutation symmetries

Shadan Ghassemi Tabrizi, Thomas D. Kühne

We extend a recent GPU implementation of the finite-temperature Lanczos method (FTLM) for Heisenberg spin Hamiltonians, which uses only total-magnetization symmetry, to the full pe…

cond-mat.str-el2026

GPU-accelerated finite-temperature Lanczos method for spin Hamiltonians

Shadan Ghassemi Tabrizi, Thomas D. Kühne

We present a GPU implementation of the finite-temperature Lanczos method (FTLM) for Heisenberg spin Hamiltonians that targets workstation hardware rather than distributed-memory cl…

cond-mat.str-el2026

SCF framework, HF stability and RPA correlation for Jordan-Wigner-transformed spin Hamiltonians on arbitrary coupling topologies

Shadan Ghassemi Tabrizi, Thomas M. Henderson, Thomas D. Kühne +1

Mapping spins to fermions via the Jordan-Wigner (JW) transformation can render mean-field (Hartree-Fock, HF) descriptions effective for strongly correlated spin systems. As establi…