Ultracold Molecule Assembly with Photonic Crystals

Abstract

Photoassociation (PA) is a powerful technique to synthesize molecules directly and continuously from cold and ultracold atoms into deeply bound molecular states. In freespace, however, PA efficiency is constrained by the number of spontaneous decay channels linking the initial excited molecular state to a sea of final (meta)stable rovibronic levels. Here, we propose a novel scheme based on molecules strongly coupled to a guided photonic mode in a photonic crystal waveguide that turns PA into a powerful tool for near deterministic formation of ultracold molecules in their ground rovibrational level. Our example shows a potential ground state molecule production efficiency $>90\%$, and a saturation rate $>10^6$ molecules per second. By combining state-of-the-art cold atomic and molecular physics with nanophotonic engineering, our scheme presents a novel experimental package for trapping, cooling, and optical manipulation of ultracold molecules, opening up new possibilities in the direction of ultracold chemistry and quantum information.

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Cited by in corpus (13)

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• Trapping single atoms on a nanophotonic circuit with configurable tweezer lattices
• Microring resonators on a membrane optical circuit for atom-light interactions
• Universal pair-polaritons in a strongly interacting Fermi gas
• Trapped atoms and superradiance on an integrated nanophotonic microring circuit
• Collective Dissipative Molecule Formation in a Cavity
• Observation of Quantum Interference and Coherent Control in a Photochemical Reaction
• Cavity-controlled ultracold chemistry
• Integrating two-photon nonlinear spectroscopy of rubidium atoms with silicon photonics
• Efficiently-coupled microring circuit for on-chip cavity QED with trapped atoms
• Resonator-assisted single molecule quantum state detection
• Nanofibre-based trap for Rb${}_2$ molecule
• Ground-state selection via many-body superradiant decay