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Title: High-dimensional discrete Fourier transform gates with a quantum frequency processor

The discrete Fourier transform (DFT) is of fundamental interest in photonic quantum information, yet the ability to scale it to high dimensions depends heavily on the physical encoding, with practical recipes lacking in emerging platforms such as frequency bins. In this article, we show thatd-point frequency-bin DFTs can be realized with a fixed three-component quantum frequency processor (QFP), simply by adding to the electro-optic modulation signals one radio-frequency harmonic per each incremental increase ind. We verify gate fidelityFW>0.9997and success probabilityPW>0.965up tod = 10 in numerical simulations, and experimentally implement the solution ford = 3, utilizing measurements with parallel DFTs to quantify entanglement and perform tomography of multiple two-photon frequency-bin states. Our results furnish new opportunities for high-dimensional frequency-bin protocols in quantum communications and networking.

 
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Award ID(s):
2034019
PAR ID:
10531128
Author(s) / Creator(s):
; ; ; ;
Publisher / Repository:
Optical Society of America
Date Published:
Journal Name:
Optics Express
Volume:
30
Issue:
6
ISSN:
1094-4087; OPEXFF
Format(s):
Medium: X Size: Article No. 10126
Size(s):
Article No. 10126
Sponsoring Org:
National Science Foundation
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