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

Abstract

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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Cited by in corpus (10)

• Witnessing Quantum Coherence: from solid-state to biological systems
• Qubit-induced phonon blockade as a signature of quantum behavior in nanomechanical resonators
• A strict experimental test of macroscopic realism in a superconducting flux qubit
• Distinguishing quantum and classical transport through nanostructures
• Generating nonclassical photon-states via longitudinal couplings between superconducting qubits and microwave fields
• Detecting quantum-coherent nanomechanical oscillations using the current-noise spectrum of a double quantum dot
• Simulating quantum dynamical phenomena using classical oscillators: Landau-Zener-Stuckelberg-Majorana interferometry, latching modulation, and motional averaging
• Quantum dynamics of spatial decoherence of two atoms in a ring cavity
• Reconciling quantum and classical spectral theories of ultrastrong coupling: Role of cavity bath coupling and gauge corrections
• Investigation of resonant and transient phenomena in Josephson junction flux qubits