352 citations · 3.4k across the 93 of their papers we have counts for
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Transition from quantum to classical Heisenberg trimers: Thermodynamics and time correlation functions
D. Mentrup, H. -J. Schmidt, J. Schnack +1
We focus on the transition from quantum to classical behavior in thermodynamic functions and time correlation functions of a system consisting of three identical quantum spins s th…
Ground state properties of antiferromagnetic Heisenberg spin rings
K. Baerwinkel, H. -J. Schmidt, J. Schnack
Exact ground state properties of antiferromagnetic Heisenberg spin rings with isotropic next neighbour interaction are presented for various numbers of spin sites and spin quantum…
On cyclically shifted strings
K. Baerwinkel, H. -J. Schmidt, J. Schnack
If a string is cyclically shifted it will re-appear after a certain number of shifts, which will be called its order. We solve the problem of how many strings exist with a given or…
Structure and relevant dimension of the Heisenberg model and applications to spin rings
K. Baerwinkel, H. -J. Schmidt, J. Schnack
For the diagonalization of the Hamilton matrix in the Heisenberg model relevant dimensions are determined depending on the applicable symmetries. Results are presented, both, by ge…
Spin dynamics of quantum and classical Heisenberg dimers
D. Mentrup, J. Schnack, Marshall Luban
Analytical solutions for the time-dependent autocorrelation function of the classical and quantum mechanical spin dimer with arbitrary spin are presented and compared. For large sp…
Realistic Interactions and Configuration Mixing in Fermionic Molecular Dynamics
T. Neff, H. Feldmeier, R. Roth +1
In Fermionic Molecular Dynamics the occurrence of multifragmentation depends strongly on the intrinsic structure of the many-body state. Slater determinants with narrow single-part…