Abstract
A theoretical approach to the consistent full quantum description of the ultrafast population transfer and magnetization reversal in superconducting meta-atoms induced by picosecond unipolar pulses of a magnetic field is developed. A promising scheme based on the regime of stimulated Raman Λ-type transitions between qubit states via upper-lying levels is suggested in order to provide ultrafast quantum operations on the picosecond time scale. The experimental realization of a circuit-on-chip for the discussed ultrafast control is presented.
Highlights
One of the main problems of modern quantum physics is the transfer and storage of quantum information
In the case when the resonance carrier (“filled”) pulses are used for the qubit state preparation and control, the characteristic Rabi-period appears to be in the nanosecond range, which is caused by the small energy separation and near-degeneracy of the atomic levels
In the section “Results and Discussion” we firstly show the theoretical results obtained for the scheme with blocked direct transitions between qubit states and demonstrate an ultrafast Raman Λ-type “Not”-operation stimulated by a unipolar magnetic pulse
Summary
One of the main problems of modern quantum physics is the transfer and storage of quantum information. In the case when the resonance carrier (“filled”) pulses are used for the qubit state preparation and control, the characteristic Rabi-period appears to be in the nanosecond range, which is caused by the small energy separation and near-degeneracy of the atomic levels. For this reason an important task is to decrease the time of the operations with meta-atoms
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