title: Ultrametricity property of energy landscapes of multidisperse packing problems.
abstract: We consider the problem of finding the densest closed packing of hard disks with proposed different radii in a circular environment, such that the radius of the circumcircle is minimal. The subspace of the quasioptimum configurations of this problem exhibits the property of ultrametricity.
authors.affiliation: Department of Physics, Mathematics, and Computer Science, Johannes Gutenberg University of Mainz, Staudinger Weg 7, 55099 Mainz, Germany. schneidj@uni-mainz.de
authors.forename: Johannes J
authors.initials: JJ
authors.lastname: Schneider
authors.forename: André
authors.initials: A
authors.lastname: Müller
authors.forename: Elmar
authors.initials: E
authors.lastname: Schömer