Journal
QUANTUM INFORMATION PROCESSING
Volume 8, Issue 2-3, Pages 245-259Publisher
SPRINGER
DOI: 10.1007/s11128-009-0102-4
Keywords
Landau-Zener tunneling; Superconducting qubits; Multiphoton transitions; Franck-Condon physics; Aharonov-Anandan phase
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We investigate phase-sensitive interference effects in a periodically sin(2 pi f (rf) t)-driven, artificial two-state system connected to a microwave resonator at f (LC) a parts per thousand integral 800 MHz. We observe two kinds of multiphoton transitions in the two-state system, accompanied by: (1) Several quanta from the drive at f (rf) and (2) one quantum at f (rf) and several at f (LC) . The former are described using phase-sensitive Landau-Zener transitions, while the latter are discussed in terms of vibronic transitions in diatomic molecules. Interference effects in the vibronic transitions governed by Franck-Condon coefficients are also considered.
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