Ion-mediated interaction and controlled phase gate operation between two atomic qubits

TL;DR

This paper proposes a model for ion-atom hybrid quantum systems where ion-mediated interactions enable high-fidelity two-qubit gates between distant atomic qubits, advancing quantum computing capabilities.

Contribution

It introduces a novel ion-mediated interaction mechanism for atomic qubits and demonstrates high-fidelity controlled phase gate operation.

Findings

Ion-mediated interaction surpasses direct atom-atom interaction at large distances.

Achieved 97% fidelity in two-qubit controlled phase gate.

Potential for scalable quantum computing with hybrid systems.

Abstract

We propose a toy model of ion-atom hybrid quantum system for quantum computing. We show that when two atomic qubits in two largely separated optical tweezers interact with a single trapped ion through Rydberg excitation of the atoms, there exists an ion-mediated atom-atom interaction which exceeds the direct interatomic interaction at large separation. We employ this mediated interaction to demonstrate two-qubit control phase gate operation with 97\% fidelity by addressing the individual atomic qubits with lasers.