Work

Orchestrating time and color: a programmable source of high-dimensional entanglement

Year: 2024

Type: article

Abstract: High-dimensional encodings based on temporal modes (TMs) of photonic quantum states provide the foundations for a highly versatile and efficient quantum information science (QIS) framework. Here, we demonstrate a crucial building block for any QIS applications based on TMs: a programmable source of maximally entangled high-dimensional TM states. Our source is based on a parametric downconversion process driven by a spectrally shaped pump pulse, which facilitates the generation of maximally entangled TM states with a well-defined dimensionality that can be chosen programmatically. We characterize the effective dimensionality of the generated states via measurements of second-order correlation functions and joint spectral intensities, demonstrating the generation of bi-photon TM states with a controlled dimensionality in up to 20 dimensions.

Source: Optica Quantum

DOI: 10.1364/opticaq.532334

Authors: Laura Serino, Werner Ridder, Abhinandan Bhattacharjee, Jano Gil-Lopez, Benjamin Brecht, Christine Silberhorn

Institution: Paderborn University

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: diamond

Funders: Deutsche Forschungsgemeinschaft, QuantERA, Horizon 2020 Framework Programme

Awards: TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen, G4347880889, G7258811779, G731109193