Non-Gaussian photonic state engineering with the quantum frequency processor

Andrew J. Pizzimenti, Joseph M. Lukens, Hsuan Hao Lu, Nicholas A. Peters, Saikat Guha, Christos N. Gagatsos

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


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 Schrödinger cat states, exploring the performance tradeoffs for several combinations of ancilla modes and circuit depth. Our scheme provides a valuable framework for producing complex quantum states in frequency bins, paving the way for single-spatial-mode, fiber-optic-compatible non-Gaussian resources.

Original languageEnglish (US)
Article number062437
JournalPhysical Review A
Issue number6
StatePublished - Dec 2021

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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