Pseudo-Rabi oscillations in superconducting flux qubits in the classical regime

Details Pseudo-Rabi oscillations in superconducting flux qubits in the classical regime Pseudo-Rabi oscillations in superconducting flux qubits in the classical regime

2007-05-12

arxiv.org/abs/0705.1768v1

Phys. Rev. B 78 (2008) 054512

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevB.78.054512

Nonlinear effects in mesoscopic devices can have both quantum and classical origins. We show that a three-Josephson-junction (3JJ) flux qubit in the _classical_ regime can produce low-frequency oscillations in the presence of an external field in resonance with the (high-frequency) harmonic mode of the system, $\omega$. Like in the case of_quantum_ Rabi oscillations, the frequency of these pseudo-Rabi oscillations is much smaller than $\omega$ and scales approximately linearly with the amplitude of the external field. This classical effect can be reliably distinguished from its quantum counterpart because it can be produced by the external perturbation not only at the resonance frequency $\omega$ and its subharmonics ($\omega/n$), but also at its overtones, $n\omega$.

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