# Single-laser-pulse implementation of arbitrary ZYZ rotations of an atomic qubit

## TL;DR

This paper demonstrates a novel method to perform arbitrary ZYZ rotations of an atomic qubit using a single shaped laser pulse, simplifying the control process in quantum operations.

## Contribution

The authors introduce a single-pulse technique with a shaped femtosecond laser pulse to implement ZYZ rotations, reducing complexity compared to traditional multi-pulse sequences.

## Key findings

- Successful implementation of ZYZ rotations with a single shaped pulse
- Strong agreement between experimental results and theoretical predictions
- Potential for simplified quantum control in atomic qubits

## Abstract

Arbitrary rotation of a qubit can be performed with a three-pulse sequence; for example, ZYZ rotations. However, this requires precise control of the relative phase and timing between the pulses, making it technically challenging in optical implementation in a short time scale. Here we show any ZYZ rotations can be implemented with a single laser-pulse, that is {\it a chirped pulse with a temporal hole}. The hole of this shaped pulse induces a non-adiabatic interaction in the middle of the adiabatic evolution of the chirped pulse, converting the central part of an otherwise simple Z-rotation to a Y rotation, constructing ZYZ rotations. The result of our experiment performed with shaped femtosecond laser pulses and cold rubidium atoms shows strong agreement with the theory.