Rabi-like oscillations of an anharmonic oscillator: classical versus quantum interpretation

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dc.creatorClaudon, Julien
dc.creatorZazunov, Alex
dc.creatorHekking, Frank W. J.
dc.creatorBuisson, Olivier
dc.date2007-09-24
dc.date2008-09-10
dc.date.accessioned2026-07-07T12:28:10Z
dc.date.available2026-07-07T12:28:10Z
dc.descriptionWe have observed Rabi-like oscillations in a current-biased dc SQUID presenting enhanced coherence times compared to our previous realization \cite{Claudon_PRL04}. This Josephson device behaves as an anharmonic oscillator which can be driven into a coherent superposition of quantum states by resonant microwave flux pulses. Increasing the microwave amplitude, we study the evolution of the Rabi frequency from the 2-level regime to the regime of multilevel dynamics. When up to 3 levels are involved, the Rabi frequency is a clear signature of quantum behavior. At higher excitation amplitude, classical and quantum predictions for the Rabi frequency converge. This result is discussed in the light of a calculation of the Wigner function. In particular, our analysis shows that pronounced quantum interferences always appear in the course of the Rabi-like oscillations.
dc.description8 pages
dc.identifierhttps://arxiv.org/abs/0709.3787
dc.identifierhttp://arxiv.org/abs/0709.3787
dc.identifierPhysical Review B 78 (2008) 184503
dc.identifierdoi:10.1103/PhysRevB.78.184503
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/215451
dc.subjectMesoscale and Nanoscale Physics
dc.titleRabi-like oscillations of an anharmonic oscillator: classical versus quantum interpretation
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