Quantum computing with alkaline earth atoms

TL;DR

This paper proposes a comprehensive quantum computing scheme using alkaline earth atoms, leveraging their unique energy states for qubit storage, transport, and gate operations with innovative addressing and loss mechanisms.

Contribution

It introduces a novel scheme utilizing independent lattices and metastable states of alkaline earth atoms for scalable quantum information processing.

Findings

Two independent lattices enable qubit storage and transport.

Metastable states facilitate gate operations via lossy blockade.

Addressing of individual qubits is achieved through the $^3$P$_2$ level.

Abstract

We present a complete scheme for quantum information processing using the unique features of alkaline earth atoms. We show how two completely independent lattices can be formed for the $^1$S$_0$ and $^3$P$_0$ states, with one used as a storage lattice for qubits encoded on the nuclear spin, and the other as a transport lattice to move qubits and perform gate operations. We discuss how the $^3$P$_2$ level can be used for addressing of individual qubits, and how collisional losses from metastable states can be used to perform gates via a lossy blockade mechanism.