Dynamic parity recovery in a strongly driven Cooper-pair box

Abstract

We study a superconducting charge qubit coupled to an intensive electromagnetic field and probe changes in the resonance frequency of the formed dressed states. At large driving strengths, exceeding the qubit energy-level splitting, this reveals the well known Landau-Zener-Stuckelberg (LZS) interference structure of a longitudinally driven two-level system. For even stronger drives we observe a significant change in the LZS pattern and contrast. We attribute this to photon-assisted quasiparticle tunneling in the qubit. This results in the recovery of the qubit parity, eliminating effects of quasiparticle poisoning and leads to an enhanced interferometric response. The interference pattern becomes robust to quasiparticle poisoning and has a good potential for accurate charge sensing.

5 pages, 4 figures

References in corpus (9)

• Controlling the spontaneous emission of a superconducting transmon qubit
• Single artificial-atom lasing
• Quasiparticle relaxation of superconducting qubits in the presence of flux
• Coherence times of dressed states of a superconducting qubit under extreme driving
• Amplitude Spectroscopy of a Solid-State Artificial Atom
• Energy decay and frequency shift of a superconducting qubit from non-equilibrium quasiparticles
• Consistency of ground state and spectroscopic measurements on flux qubits
• Nuclear State Preparation via Landau-Zener-Stueckelberg transitions in Double Quantum Dots
• Dressed-state amplification by a superconducting qubit

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• Multi-photon dressing of an anharmonic superconducting many-level quantum circuit
• Microwave-assisted tunneling and interference effects in superconducting junctions under fast driving signals
• Low-Loss Superconducting Nanowire Circuits Using a Neon Focused Ion Beam
• Multi-level interference resonances in strongly-driven three-level systems
• Microwave photon-assisted phase-incoherent Cooper-pair tunneling in a Josephson STM
• Dynamic transition in Landau-Zener-Stückelberg interferometry of dissipative systems: the case of the flux qubit
• Creating photon-number squeezed strong microwave fields by a Cooper-pair injection laser
• Design of a Cooper pair box electrometer for application to solid-state and astroparticle physics
• Revealing the system-bath coupling via Landau-Zener-Stückelberg interferometry in superconducting qubits
• Quantization of the superconducting energy gap in an intense microwave field
• Theory of quasiparticle generation by microwave drives in superconducting qubits