128 citations · 793 across the 55 of their papers we have counts for
Showing 2002Show all
3 papers · 1 filter
cond-mat.stat-mech2002★ 2 cited
Improved upper and lower energy bounds for antiferromagnetic Heisenberg spin systems
K. Baerwinkel, H. -J. Schmidt, J. Schnack
Large spin systems as given by magnetic macromolecules or two-dimensional spin arrays rule out an exact diagonalization of the Hamiltonian. Nevertheless, it is possible to derive u…
cond-mat.stat-mech2002
Symmetric polynomials in physics
Heinz-Juergen Schmidt, Juergen Schnack
We give two examples where symmetric polynomials play an important role in physics: First, the partition functions of ideal quantum gases are closely related to certain symmetric p…
cond-mat2002
Classical ground states of symmetrical Heisenberg spin systems
Heinz-Juergen Schmidt, Marshall Luban
We investigate the ground states of classical Heisenberg spin systems which have point group symmetry. Examples are the regular polygons (spin rings) and the seven quasi-regular po…