715 citations
- Max Planck Institute for the Physics of Complex SystemsDE7 papers
- Institute of PhysicsPL5 papers
- Laboratoire de Physique ThéoriqueFR5 papers
- Russian Academy of SciencesRU5 papers
- Otto-von-Guericke-Universität MagdeburgDE4 papers
- Queen's UniversityCA4 papers
- Stony Brook UniversityUS4 papers
- Universidad Nacional de La PlataAR4 papers
- École Normale Supérieure de LyonFR3 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di PaviaIT3 papers
- Laboratoire de Physique de l'ENS de LyonFR3 papers
- Technische Universität DresdenDE3 papers
10 papers · 1 filter
Maximum dispersion and geometric maximum weight cliques
Sandor P. Fekete, Henk Meijer
We consider a facility location problem, where the objective is to ``disperse'' a number of facilities, i.e., select a given number k of locations from a discrete set of n candidat…
A combinatorial characterization of higher-dimensional orthogonal packing
Sandor P. Fekete, Joerg Schepers
Higher-dimensional orthogonal packing problems have a wide range of practical applications, including packing, cutting, and scheduling. Previous efforts for exact algorithms have b…
On the continuous Fermat-Weber problem
Sandor P. Fekete, Joseph S. B. Mitchell, Karin Beurer
We give the first exact algorithmic study of facility location problems that deal with finding a median for a continuum of demand points. In particular, we consider versions of the…
Exact eigenstates and macroscopic magnetization jumps in strongly frustrated spin lattices
J. Richter, J. Schulenburg, A. Honecker +2
For a class of frustrated spin lattices including e.g. the 1D sawtooth chain, the 2D kagomé and checkerboard, as well as the 3D pyrochlore lattices we construct exact product eigen…
Magnetization plateaus in frustrated antiferromagnetic quantum spin models
A. Honecker, J. Schulenburg, J. Richter
Plateaus can be observed in the zero-temperature magnetization curve of quantum spin systems at rational values of the magnetization. In one dimension, the appearance of a plateau…
Thermodynamic properties of ferromagnetic mixed-spin chain systems
Noboru Fukushima, Andreas Honecker, Stefan Wessel +1
Using a combination of high-temperature series expansion, exact diagonalization and quantum Monte Carlo, we perform a complementary analysis of the thermodynamic properties of quas…