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Enhanced Quantum Control of Individual Ultracold Molecules Using Optical Tweezer Arrays (2024)
Journal Article
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

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 a... Read More about Enhanced Quantum Control of Individual Ultracold Molecules Using Optical Tweezer Arrays.

Modulation transfer spectroscopy of the D1 transition of potassium: theory and experiment (2024)
Journal Article
Innes, A. D., Majumder, P., Noh, H. R., & Cornish, S. L. (2024). Modulation transfer spectroscopy of the D1 transition of potassium: theory and experiment. Journal of Physics B: Atomic, Molecular and Optical Physics, 57(7), Article 075401. https://doi.org/10.1088/1361-6455/ad31af

We report on a study of modulation transfer spectroscopy of the 4S1/2 → 4P1/2 (D1) transition of naturally abundant potassium in a room-temperature vapour cell. This transition is critical for laser cooling and optical pumping of potassium and our st... Read More about Modulation transfer spectroscopy of the D1 transition of potassium: theory and experiment.

Long-distance optical-conveyor-belt transport of ultracold 133 Cs and 87 Rb atoms (2024)
Journal Article
Matthies, A. J., Mortlock, J. M., McArd, L. A., Raghuram, A. P., Innes, A. D., Bromley, S. L., & Cornish, S. L. (2024). Long-distance optical-conveyor-belt transport of ultracold 133 Cs and 87 Rb atoms. Physical Review A, 109(2), Article 023321. https://doi.org/10.1103/physreva.109.023321

We report on the transport of a thermal cloud of ultracold cesium and rubidium atoms over about 37 cm in under 25 ms using an optical conveyor belt formed by two counterpropagating beams with a controllable frequency difference that generate a movabl... Read More about Long-distance optical-conveyor-belt transport of ultracold 133 Cs and 87 Rb atoms.

Second-scale rotational coherence and dipolar interactions in a gas of ultracold polar molecules (2024)
Journal Article
Gregory, P. D., Fernley, L. M., Tao, A. L., Bromley, S. L., Stepp, J., Zhang, Z., …Cornish, S. L. (2024). Second-scale rotational coherence and dipolar interactions in a gas of ultracold polar molecules. Nature Physics, 20(3), 415-421. https://doi.org/10.1038/s41567-023-02328-5

Ultracold polar molecules combine a rich structure of long-lived internal states with access to controllable long-range anisotropic dipole–dipole interactions. In particular, the rotational states of polar molecules confined in optical tweezers or op... Read More about Second-scale rotational coherence and dipolar interactions in a gas of ultracold polar molecules.

Observation of Rydberg blockade due to the charge-dipole interaction between an atom and a polar molecule (2023)
Journal Article
Guttridge, A., Ruttley, D., Baldock, A., González-Férez, R., Sadeghpour, H., Adams, C., & Cornish, S. (2023). Observation of Rydberg blockade due to the charge-dipole interaction between an atom and a polar molecule. Physical Review Letters, 131(1), Article 013401. https://doi.org/10.1103/PhysRevLett.131.013401

We demonstrate Rydberg blockade due to the charge-dipole interaction between a single Rb atom and a single RbCs molecule confined in optical tweezers. The molecule is formed by magnetoassociation of a Rb+Cs atom pair and subsequently transferred to t... Read More about Observation of Rydberg blockade due to the charge-dipole interaction between an atom and a polar molecule.

A motorized rotation mount for the switching of an optical beam path in under 20 ms using polarization control (2023)
Journal Article
Raghuram, A. P., Mortlock, J. M., Bromley, S. L., & Cornish, S. L. (2023). A motorized rotation mount for the switching of an optical beam path in under 20 ms using polarization control. Review of Scientific Instruments, 94(6), https://doi.org/10.1063/5.0139647

We present a simple motorized rotation mount for a half-wave plate that can be used to rapidly change the polarization of light. We use the device to switch a high power laser beam between different optical dipole traps in an ultracold atom experimen... Read More about A motorized rotation mount for the switching of an optical beam path in under 20 ms using polarization control.

Formation of Ultracold Molecules by Merging Optical Tweezers (2023)
Journal Article
Ruttley, D. K., Guttridge, A., Spence, S., Bird, R. C., Le Sueur, C. R., Hutson, J. M., & Cornish, S. L. (2023). Formation of Ultracold Molecules by Merging Optical Tweezers. Physical Review Letters, 130(22), https://doi.org/10.1103/physrevlett.130.223401

We demonstrate the formation of a single RbCs molecule during the merging of two optical tweezers, one containing a single Rb atom and the other a single Cs atom. Both atoms are initially predominantly in the motional ground states of their respectiv... Read More about Formation of Ultracold Molecules by Merging Optical Tweezers.

Feshbach Spectroscopy of Cs Atom Pairs in Optical Tweezers (2022)
Journal Article
Brooks, R. V., Guttridge, A., Frye, M. D., Ruttley, D. K., Spence, S., Hutson, J. M., & Cornish, S. L. (2022). Feshbach Spectroscopy of Cs Atom Pairs in Optical Tweezers. New Journal of Physics, 24, Article 113051. https://doi.org/10.1088/1367-2630/ac99f6

We prepare pairs of 133Cs atoms in a single optical tweezer and perform Feshbach spectroscopy for collisions of atoms in the states (f = 3, mf = ±3). We detect enhancements in pair loss using a detection scheme where the optical tweezers are repeated... Read More about Feshbach Spectroscopy of Cs Atom Pairs in Optical Tweezers.

Observation of magnetic Feshbach resonances between Cs and 173Yb (2022)
Journal Article
Franzen, T., Guttridge, A., Wilson, K. E., Segal, J., Frye, M. D., Hutson, J. M., & Cornish, S. L. (2022). Observation of magnetic Feshbach resonances between Cs and 173Yb. Physical Review Research, 4(4), Article 043072. https://doi.org/10.1103/physrevresearch.4.043072

We report the observation of magnetic Feshbach resonances between 173 Yb and 133 Cs . In a mixture of Cs atoms prepared in the ( f = 3 , m f = 3 ) state and unpolarized fermionic 173 Yb , we observe resonant atom loss due to two sets of magnetic Fesh... Read More about Observation of magnetic Feshbach resonances between Cs and 173Yb.