Unipolar magnetic field pulses as an advantageous tool for ultrafast operations in superconducting Josephson “atoms”

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.

Keywords

• adiabatic superconducting logic
• Josephson “atoms”
• quantum-state-control
• superconducting qubits
• ultrafast quantum operations