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Cavity-enhanced efficient optical quantum memory for multiplexed entanglement distribution

Project description

Paving the way for a European quantum network

Quantum repeaters are designed to facilitate quantum communication by mitigating decoherence and transmission loss in quantum channels. However, current devices have limitations with regard to entanglement distribution over long distances, memory storage and scalability. Supported by the Marie Skłodowska-Curie Actions programme, the CAMERAS project aims to address these issues by engineering groundbreaking quantum memory for efficient long-distance entanglement distribution. To do so, it will develop cavity-enhanced on-demand quantum memory for single photons with minimal optical loss and noise. It will also create a novel spatiotemporal frequency multiplexing scheme that enables increased storage for multiple degrees of freedom. Its feasibility will be demonstrated by efficiently distributing light-matter entanglement over a 50-kilometre optical fibre in an urban area.

Objective

Recent breakthroughs in quantum technologies combining academic and R&D efforts have ushered quantum networks into a new era, where quantum information can be stored, processed, and transferred. A key challenge in this new era is enhancing the capabilities of individual nodes to realize a quantum repeater that will extend quantum links to reach continental distances. Quantum memories are one of the building blocks for synchronizing temporal events in a quantum repeater, allowing entanglement distribution beyond the physical limitations of fiber loss. In this context, our proposed research seeks to push the boundaries of quantum communication by developing a cutting-edge quantum memory designed for high-rate, long-distance entanglement distribution. The project focuses on the development of an efficient, multiplexed, cavity-enhanced quantum memory using a praseodymium (Pr3+)-doped yttrium orthosilicate (YSO) crystal, known for its long coherence times and multiplexing capabilities. The first objective is to demonstrate a cavity-enhanced on-demand quantum memory for single photons, using the spin-wave atomic frequency comb protocol. The challenge is to mitigate optical loss and noise to enable single-photon storage with a high signal-to-noise ratio. The second objective aims at implementing a novel spatial multiplexing scheme that leverages non-trivial collective spin excitations in the cavity memory. This will be combined with temporal and frequency multiplexing to enhance the memory's capacity to store multiple degrees of freedom. The ultimate goal is to distribute light-matter entanglement using cavity-enhanced multimode quantum memory over a 50 km deployed optical fiber in a metropolitan area. Our approach seeks to achieve higher efficiency and increased rates, which are essential for practical metropolitan quantum networks. These milestones are important steps toward building a robust application-ready quantum network and establishing a European quantum internet.

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

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Call for proposal

(opens in new window) HORIZON-MSCA-2024-PF-01

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Coordinator

FUNDACIO INSTITUT DE CIENCIES FOTONIQUES
Net EU contribution
€ 209 914,56
Address
AVINGUDA CARL FRIEDRICH GAUSS 3
08860 Castelldefels
Spain
Region
Este Cataluña Barcelona
Activity type
Research Organisations
Links
Total cost
No data