Titel:	Solitary objects on quantum spin rings
Autor(en):	Shchelokovskyy, Pavlo
Erstgutachter:	Prof. Dr. Klaus Bärwinkel apl. Prof. Dr. Heinz-Jürgen Schmidt apl. Prof. Dr. Jürgen Schnack
Zweitgutachter:	apl. Prof. Dr. Klaus Betzler
Zusammenfassung:	We investigate whether quantum spin rings with nearest-neighbor Heisenberg or Ising exchange interactions can host solitary states. Using complete diagonalization techniques the system is described without classical or semiclassical approximation. In this case definitions used in connection with classical solitons are not applicable, one needs to redefine what solitary objects on a quantum spin system with translational symmetry ought to be. Thus, we start our contribution by defining which quantum states possess solitary character. In addition we discuss useful observables in order to visualize solitary quantum states. Then we demonstrate for various quantum spin rings that solitary quantum states indeed exist, and that they are moving around the spin ring without changing their shape in the course of time.
URL:	https://osnadocs.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2004121610
Schlagworte:	Molecular magnets; Heisenberg model; Spin rings; Solitons
Erscheinungsdatum:	16-Dez-2004
Einreichungsdatum:	16-Dez-2004
Publikationstyp:	Dissertation oder Habilitation [doctoralThesis]
Enthalten in den Sammlungen:	FB06 - E-Dissertationen

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