Generation and characterization of ultrabroadband polarization-frequency hyperentangled photons
arXiv:2308.16285 · doi:10.1364/OL.503127
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.
References in corpus (9)
- Distillation of secret key and entanglement from quantum states
- Beating the channel capacity limit for linear photonic superdense coding
- Integrated micro-comb sources for quantum optical applications
- Bloch vectors for qudits
- Long-distance entanglement purification for quantum communication
- Superdense coding over optical fiber links with complete Bell-state measurements
- Fully Arbitrary Control of Frequency-Bin Qubits
- Quantum frequency combs and Hong-Ou-Mandel interferometry: the role of spectral phase coherence
- Telecom-band Hyperentangled Photon Pairs from a Fiber-based Source