Enhanced Quantum Control of Individual Ultracold Molecules Using Optical Tweezer Arrays

Ruttley, Daniel K.; Guttridge, Alexander; Hepworth, Tom R.; Cornish, Simon L.

Abstract

Control over the quantum states of individual molecules is crucial in the quest to harness their rich internal structure and dipolar interactions for applications in quantum science. In this paper, we develop a toolbox of techniques for the control and readout of individually trapped polar molecules in an array of optical tweezers. Starting with arrays of up to eight Rb and eight Cs atoms, we assemble arrays of RbCs molecules in their rovibrational and hyperfine ground state with an overall efficiency of 48(2)%. We demonstrate global microwave control of multiple rotational states of the molecules and use an auxiliary tweezer array to implement site-resolved addressing and state control. We show how the rotational state
of the molecule can be mapped onto the position of Rb atoms and use this capability to readout multiple rotational states in a single experimental run. Further, using a scheme for the midsequence detection of molecule formation errors, we perform rearrangement of assembled molecules to prepare small defect-free arrays. Finally, we discuss a feasible route to scaling to larger arrays of molecules.

Citation

Ruttley, D. K., Guttridge, A., Hepworth, T. R., & Cornish, S. L. (2024). Enhanced Quantum Control of Individual Ultracold Molecules Using Optical Tweezer Arrays. PRX Quantum, 5(2), Article 020333. https://doi.org/10.1103/prxquantum.5.020333

• Journal Article Type: Article
• Acceptance Date: Mar 8, 2024
• Online Publication Date: May 13, 2024
• Publication Date: May 13, 2024
• Deposit Date: Jul 8, 2024
• Publicly Available Date: Jul 8, 2024
• Journal: PRX Quantum
• Electronic ISSN: 2691-3399
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 5
• Issue: 2
• Article Number: 020333
• DOI: https://doi.org/10.1103/prxquantum.5.020333
• Public URL: https://durham-repository.worktribe.com/output/2521986