A scalable quantum computer with an ultranarrow optical transition of ultracold neutral atoms in an optical lattice

TL;DR

This paper proposes a scalable quantum computing scheme using ultracold ytterbium atoms in an optical lattice, leveraging nuclear Zeeman sublevels for qubit encoding and control, with feasible experimental parameters.

Contribution

It introduces a novel quantum computing approach with ultracold neutral atoms utilizing nuclear Zeeman sublevels for enhanced control and scalability.

Findings

Scheme is scalable and feasible with current technology

Uses nuclear Zeeman sublevels to avoid phase evolution issues

Demonstrates potential for constructing multiqubit gates

Abstract

We propose a new quantum-computing scheme using ultracold neutral ytterbium atoms in an optical lattice. The nuclear Zeeman sublevels define a qubit. This choice avoids the natural phase evolution due to the magnetic dipole interaction between qubits. The Zeeman sublevels with large magnetic moments in the long-lived metastable state are also exploited to address individual atoms and to construct a controlled-multiqubit gate. Estimated parameters required for this scheme show that this proposal is scalable and experimentally feasible.