Generation and characterization of ultrabroadband polarization-frequency hyperentangled photons

• URL: http://arxiv.org/abs/2308.16285v1
• Date: Wed, 30 Aug 2023 19:26:26 GMT
• Title: Generation and characterization of ultrabroadband polarization-frequency hyperentangled photons
• Authors: Hsuan-Hao Lu, Muneer Alshowkan, Karthik V. Myilswamy, Andrew M. Weiner, Joseph M. Lukens, and Nicholas A. Peters
• Abstract summary: We generate ultrabroadband photon pairs entangled in both polarization and frequency bins through an all-waveguided Sagnac source covering the entire optical C- and L-bands. We perform comprehensive characterization of high-fidelity states in multiple dense wavelength-division multiplexed channels, achieving full tomography of effective four-qubit systems.
• Score: 0.5328504363926873
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We generate ultrabroadband photon pairs entangled in both polarization and frequency bins through an all-waveguided Sagnac source covering the entire optical C- and L-bands (1530--1625 nm). We perform comprehensive characterization of high-fidelity states in multiple dense wavelength-division multiplexed channels, achieving full tomography of effective four-qubit systems. Additionally, leveraging the inherent high dimensionality of frequency encoding and our electro-optic measurement approach, we demonstrate the scalability of our system to higher dimensions, reconstructing states in a 36-dimensional Hilbert space consisting of two polarization qubits and two frequency-bin qutrits. Our findings hold potential significance for quantum networking, particularly dense coding and entanglement distillation in wavelength-multiplexed quantum networks.

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