Enhanced local addressability of a spin array with local exchange pulses and global microwave driving

TL;DR

This paper proposes a theoretical method to selectively manipulate individual spins in large qubit arrays using a combination of global microwave fields and local exchange pulses, achieving high fidelity operations even with random g-factor distributions.

Contribution

It introduces a novel strategy combining single-qubit and SWAP gates with global and local controls to enhance addressability in large spin qubit arrays.

Findings

Gate fidelities above 99% for tens of qubits

Selective addressing despite random g-factors

Method applicable to large spin arrays

Abstract

We theoretically propose a strategy to address an individual spin in a large array of spin qubits with a random distribution of g-factors by employing a combination of single-qubit and SWAP gates facilitated by a global microwave field and local exchange pulses. Consequently, only the target qubit undergoes the desired operation and all other qubits return to their original states, even qubits that share the same Larmor frequency as the target. Gate fidelities above 99% can thus be maintained for arrays containing tens of qubits.