Programmable time-frequency mode-sorting of single photons with a multi-output quantum pulse gate

• URL: http://arxiv.org/abs/2410.03606v1
• Date: Fri, 4 Oct 2024 17:07:02 GMT
• Title: Programmable time-frequency mode-sorting of single photons with a multi-output quantum pulse gate
• Authors: Laura Serino, Christof Eigner, Benjamin Brecht, Christine Silberhorn,
• Abstract summary: We demonstrate a high-dimensional mode-sorter for single photons based on a multi-output quantum pulse gate. This device can facilitate practical realizations of quantum information applications.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We demonstrate a high-dimensional mode-sorter for single photons based on a multi-output quantum pulse gate, which we can program to switch between different temporal-mode encodings including pulse modes, frequency bins, time bins, and their superpositions. This device can facilitate practical realizations of quantum information applications such as high-dimensional quantum key distribution, and thus enables secure communication with enhanced information capacity. We characterize the mode-sorter through a detector tomography in 3 and 5 dimensions and find a fidelity up to $0.958\pm 0.030$ at the single-photon level.

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