Ultracold Molecules: Their Formation and Application to Quantum Computing
Robin Côté · Advances in chemical physics · 2014
This chapter begins with a short overview of the key ingredient for quantum information (QI) processing with ultracold molecules, namely how to obtain ultracold molecules. It reviews existing techniques, and then focuses on a particular approach based on photoassociation near a Feshbach resonance, and its extension to coherent atom-molecule transfer. The chapter describes the foundations of QI and computing. It gives a comparison of classical and quantum units of information, and lists various quantum algorithms. The chapter discusses entangled states and quantum logic phase gates, and enumerates various properties needed to realize quantum computing. It describes atom-molecule platform that combines the principal advantages of the neutral atom and polar molecule-based approaches; this hybrid platform employs atoms with long-lived states to encode qubits, initialize and read out their states, and polar molecules to perform two-qubit gates.