Rabi oscillations of a qubit coupled to a two-level system

Abstract

The problem of Rabi oscillations in a qubit coupled to a fluctuator and in contact with a heath bath is considered. A scheme is developed for taking into account both phase and energy relaxation in a phenomenological way, while taking full account of the quantum dynamics of the four-level system subject to a driving AC field. Significant suppression of the Rabi oscillations is found when the qubit and fluctuator are close to resonance. The effect of the fluctuator state on the read-out signal is discussed. This effect is shown to modify the observed signal significantly. This may be relevant to recent experiments by Simmonds et al. [Phys. Rev. Lett. 93, 077003 (2004)].

arXiv comment4 pages, 4 figures

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• Rabi spectroscopy of a strongly driven qubit-fluctuator system
• Finite size bath in qubit thermodynamics
• Beating in electronic transport through quantum dot based devices
• Decoherence of a quantum two-level system by spectral diffusion
• Decoherence dynamics of a qubit coupled to a quantum two-level system
• Quantum dynamics in nonequilibrium environments
• Quantum Dynamics of a Microwave Driven Superconducting Phase Qubit Coupled to a Two-Level System
• Noise and microresonance of critical current in Josephson junction induced by Kondo trap states
• Error rate reduction of single-qubit gates via noise-aware decomposition into native gates
• Probing internal bath dynamics by a Rabi oscillator-based detector
• Effects of external driving on the coherence time of a Josephson junction qubit in a bath of two level fluctuators
• Dark Periods in Rabi Oscillations of Superconducting Phase Qubit Coupled to a Microscopic Two-Level System