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Quantum phase transitions in an effective Hamiltonian: fast and slow systems
KTH, School of Information and Communication Technology (ICT), Optics and Photonics, Quantum Electronics and Quantum Optics, QEO.
2008 (English)In: JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL, ISSN 1751-8113, Vol. 41, no 35, 355301- p.Article in journal (Refereed) Published
Abstract [en]

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.
Keyword [en]
ROTATING-WAVE APPROXIMATION, COHERENT STATES, MODEL, EXTENSIONS, ALGEBRAS, BEHAVIOR, OPTICS
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-34102DOI: 10.1088/1751-8113/41/35/355301ISI: 000258386000016Scopus ID: 2-s2.0-49749152378OAI: oai:DiVA.org:kth-34102DiVA: diva2:419252
Note
QC 20110526Available from: 2011-05-26 Created: 2011-05-25 Last updated: 2011-05-26Bibliographically approved

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