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

• URL: http://arxiv.org/abs/2406.04909v2
• Date: Mon, 24 Jun 2024 09:00:28 GMT
• Title: Orchestrating time and color: a programmable source of high-dimensional entanglement
• Abstract summary: High-dimensional quantum states provide foundations for highly versatile and efficient quantum information science (QIS) framework. Here, we demonstrate a crucial building block for any QIS applications based on a parametric photonic maximal entangled TM states.
• Score: 2.2874754079405535
• License: http://creativecommons.org/licenses/by/4.0/
• 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 down-conversion 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.

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