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14 September 2020 – 17 September 2020 OSA Virtual Event - Eastern Daylight Time (UTC - 04:00)

Transduction and Communication (QTh4A)

Presider: Kai-Mei Fu, University of Washington

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12:30 - 13:00
(UTC - 04:00)

Quantum Transduction for Superconducting Qubits Using Electro-optic SiGe/Si Waveguides (QTh4A.1)
Presenter: Hanhee Paik, IBM Watson Research Center YKT Lib

High efficiency microwave-optical transduction for quantum-state transfer remains an outstanding technical challenge. Resonant electro-optic transduction via three-wave mixing is an attractive solution, with a simple operating principle that does not rely on intermediate quantum states. However, the intrinsic optical and microwave losses of electro-optic materials with large Pockels coefficients have limited the conversion efficiency of existing devices. Here, we show that an optimal conversion efficiency can be achieved with a relatively weak linear electro-optic material, as long as both the optical and microwave quality factors are high. We then discuss specific designs for electro-optic quantum transducers based on superconducting microwave resonators coupled to SiGe/Si ring resonators. We theoretically show that applying an electric field to the SiGe/Si waveguides induces an effective Pockels effect, allowing three-wave mixing without introducing loss. Together with its excellent compatibility with superconducting qubit fabrication, these nonlinear optical properties promise to make the SiGe/Si platform an exciting avenue for quantum-state frequency conversion.

Authors:Hanhee Paik, IBM Watson Research Center YKT Lib

13:00 - 13:30
(UTC - 04:00)

Building an Entanglement-sharing Quantum Network in New York (QTh4A.2)
Presenter: Eden Figueroa, SUNY Stony Brook

We will show our progress towards building a quantum network of many quantum devices capable of distributing entanglement over long distances, connecting Stony Brook University and the Brookhaven National Laboratory on Long Island, New York.

Authors:Eden Figueroa, SUNY Stony Brook