Cavity Quantum Electrodynamics with Rydberg atoms in superconducting resonators

ORAL  · Invited

Abstract

Neutral atoms in their Rydberg states interact strongly with microwave and millimeter wave (mmwave) photons. Realizing such a coupling in superconducting resonators can enable a fundamentally new regime for atom based cavity quantum electrodynamics (QED). I will describe a cryogenic cold atom experiment where we strongly couple an ensemble of Rb85 atoms to a novel, high-Q, three dimensional mmwave resonator with ample optical access for trapping and addressing atoms [1]. I will show how, by simultaneously coupling the atoms to an optical cavity, we implement a transducer that can convert single millimeter wave photons to optical photons with state-of-the-art efficiency (58 %) and bandwidth (360 kHz) [2]. I will further discuss the prospects for extending these techniques to microwave frequencies and coupling the atoms to transmons, bridging cavity and circuit QED. Finally, I will describe our efforts to use the non-linearity of the atom-resonator interaction to generate spin squeezed states.

*Funding for this research was provided by the National Science Foundation (NSF) through QLCI-HQAN grant 2016136, the Army Research Office through MURI grant W911NF2010136, and the Air Force Office of Scientific Research through MURI grant FA9550-16-1-0323. It was also supported by the University of Chicago Materials Research Science and Engineering Center, which is funded by the NSF under award DMR-1420709.

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Publication: 1. Suleymanzade, A., Anferov, A., Stone, M., Naik, R. K., Oriani, A., Simon, J., & Schuster, D. (2020). A tunable high-Q millimeter wave cavity for hybrid circuit and cavity QED experiments. Applied Physics Letters, 116(10), 104001.

2. Kumar, A., Suleymanzade, A., Stone, M., Taneja, L., Anferov, A., Schuster, D. I., & Simon, J. (2022). Quantum-limited millimeter wave to optical transduction. arXiv preprint arXiv:2207.10121.

Presenters

  • Aishwarya Kumar

    • University of Chicago

Authors

  • Aishwarya Kumar

    • University of Chicago