Synchronization of qubit ensemble under optimized $\pi$-pulse driving

TL;DR

This paper introduces an optimized smooth $cccc$-pulse technique to synchronize disordered qubits, effectively reducing inhomogeneous broadening and improving excitation accuracy under strong driving fields.

Contribution

It presents a novel method of using optimized non-rectangular $cccc$-pulses for qubit synchronization, addressing inhomogeneity issues in disordered qubit ensembles.

Findings

Effective suppression of inhomogeneous broadening.

Optimized pulse envelope achieves high synchronization accuracy.

Method applicable to off-resonant qubits under strong driving.

Abstract

We propose technique of simultaneous excitation of disordered qubits providing an effective suppression of inhomogeneous broadening in their spectral density. The technique is based on applying of optimally chosen $\pi$-pulse with non-rectangular smooth shape. We study excitation dynamics of an off-resonant qubit subjected to strong classical electromagnetic driving field with the fast reference frequency and slow envelope. Within this solution we optimize the envelope to achieve a preassigned accuracy in qubit synchronization.