Non-Gaussian photonic state engineering with the quantum frequency processor

• URL: http://arxiv.org/abs/2108.08290v2
• Date: Mon, 10 Jan 2022 20:34:24 GMT
• Title: Non-Gaussian photonic state engineering with the quantum frequency processor
• Authors: Andrew J. Pizzimenti, Joseph M. Lukens, Hsuan-Hao Lu, Nicholas A. Peters, Saikat Guha, and Christos N. Gagatsos
• Abstract summary: Non-Gaussian quantum states of light are critical resources for optical quantum information processing. We introduce a generic approach for non-Gaussian state production from input states populating discrete frequency bins.
• Score: 0.7758302353877525
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Non-Gaussian quantum states of light are critical resources for optical quantum information processing, but methods to generate them efficiently remain challenging to implement. Here we introduce a generic approach for non-Gaussian state production from input states populating discrete frequency bins. Based on controllable unitary operations with a quantum frequency processor, followed by photon-number-resolved detection of ancilla modes, our method combines recent developments in both frequency-based quantum information and non-Gaussian state preparation. Leveraging and refining the K-function representation of quantum states in the coherent basis, we develop a theoretical model amenable to numerical optimization and, as specific examples, design quantum frequency processor circuits for the production of Schr\"{o}dinger cat states, exploring the performance tradeoffs for several combinations of ancilla modes and circuit depth. Our scheme provides a valuable general framework for producing complex quantum states in frequency bins, paving the way for single-spatial-mode, fiber-optic-compatible non-Gaussian resource states.

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