Quantum phase transitions in an effective Hamiltonian: fast and slow systems
2008 (English)In: JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL, ISSN 1751-8113, Vol. 41, no 35, 355301- p.Article in journal (Refereed) Published
An effective Hamiltonian describing interaction between generic fast and slow systems is obtained in the strong interaction limit. The result is applied for studying the effect of quantum phase transition as a bifurcation of the ground state of the slow subsystem. Examples such as atom-field and atom-atom interactions are analyzed in detail.
Place, publisher, year, edition, pages
2008. Vol. 41, no 35, 355301- p.
ROTATING-WAVE APPROXIMATION, COHERENT STATES, MODEL, EXTENSIONS, ALGEBRAS, BEHAVIOR, OPTICS
IdentifiersURN: urn:nbn:se:kth:diva-34102DOI: 10.1088/1751-8113/41/35/355301ISI: 000258386000016ScopusID: 2-s2.0-49749152378OAI: oai:DiVA.org:kth-34102DiVA: diva2:419252
QC 201105262011-05-262011-05-252011-05-26Bibliographically approved