Design Methodologies for Integrated Quantum Frequency Processors

Benjamin E. Nussbaum

doi:10.1109/JLT.2022.3192759

Design Methodologies for Integrated Quantum Frequency Processors

2022-12-01

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DOI：10.1109/JLT.2022.3192759

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Frequency-encoded quantum information offers intriguing opportunities for quantum communications and networking, with the quantum frequency processor paradigm-based on electro-optic phase modulators and Fourier-transform pulse shapers-providing a path for scalable construction of quantum gates. Yet all experimental demonstrations to date have relied on discrete fiber-optic components that occupy significant physical space and impart appreciable loss. In this article, we introduce a model for the design of quantum frequency processors comprising microring resonator-based pulse shapers and integrated phase modulators. We estimate the performance of single and parallel frequency-bin Hadamard gates, finding high fidelity values that extend to frequency bins with relatively wide bandwidths. By incorporating multi-order filter designs as well, we explore the limits of tight frequency spacings, a regime extremely difficult to obtain in bulk optics. Overall, our model is general, simple to use, and extendable to other material platforms, providing a much-needed design tool for future frequency processors in integrated photonics.

Keywords:

Quantum computing

silicon photonics

optical pulse shaping

photonic integrated circuits

optical resonators

phase modulation

Design Methodologies for Integrated Quantum Frequency Processors

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