56 citations · 100 across the 5 of their papers we have counts for
6 papers
Local entanglement and String Order Parameter in dimerized models
Murod S. Bahovadinov, Oğuz Gülseren, Jürgen Schnack
In this letter, we propose an application of String Order Parameter (SOP), commonly used in quantum spin systems, to identify symmetry-protected topological phase (SPT) in fermioni…
Large-scale numerical investigations of the antiferromagnetic Heisenberg icosidodecahedron
Joerg Ummethum, Juergen Schnack, Andreas M. Laeuchli
We present up to date investigations of the antiferromagnetic Heisenberg icosidodecahedron by means of the Density Matrix Renormalization Group method. We compare our results with…
Numerically exact and approximate determination of energy eigenvalues for antiferromagnetic molecules using irreducible tensor operators and general point-group symmetries
R. Schnalle, J. Schnack
Numerical exact diagonalization is the ultimate method of choice in order to discuss static, dynamic, and thermodynamic properties of quantum systems. In this article we consider H…
Optimized perturbation theory for molecular antiferromagnets
R. Schnalle, J. Schnack
The energy spectra of mesoscopic, i.e. few-body quantum systems are of great interest in several areas of physics such as nuclear physics, cluster physics or magnetism. One way to…
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…
Evaluation of the low-lying energy spectrum of magnetic Keplerate molecules with DMRG
Matthias Exler, Juergen Schnack
We apply the density-matrix renormalization group technique to magnetic molecules in order to evaluate the low-lying energy spectrum. In particular, we investigate the giant Kepler…