Demonstrating a Driven Reset Protocol of a Superconducting Qubit

TL;DR

This paper demonstrates a practical, fast, and high-fidelity method to reset superconducting qubits to their ground state using a double drive protocol, enhancing quantum computation reliability.

Contribution

The authors experimentally implement and validate a novel double drive reset protocol for superconducting qubits, achieving rapid and high-fidelity ground state preparation.

Findings

Ground state prepared with ≥99.5% fidelity

Reset time less than 3 microseconds

Potential for faster, more reliable qubit initialization

Abstract

Qubit reset is crucial at the start of and during quantum information algorithms. We present the experimental demonstration of a practical method to force qubits into their ground state, based on driving certain qubit and cavity transitions. Our protocol, called the double drive reset of population is tested on a superconducting transmon qubit in a three-dimensional cavity. Using a new method for measuring population, we show that we can prepare the ground state with a fidelity of at least 99.5 % in less than 3 microseconds; faster times and higher fidelity are predicted upon parameter optimization.