Light Storage in Light Cages: A Scalable Platform for Multiplexed Quantum Memories
arXiv:2503.22423 · doi:10.1038/s41377-025-02085-5
Abstract
Quantum memories are essential for photonic quantum technologies, enabling long-distance quantum communication and serving as delay units in quantum computing. Hot atomic vapors using electromagnetically induced transparency provide a simple platform with second-long photon storage capabilities. Light-guiding structures enhance performance, but current hollow-core fiber waveguides face significant limitations in filling time, physical size, fabrication versatility, and large-scale integration potential. In this work, we demonstrate the storage of attenuated coherent light pulses in a cesium (Cs) quantum memory based on a 3D-nanoprinted hollow-core waveguide, known as a light cage (LC), with several hundred nanoseconds of storage times. Leveraging the versatile fabrication process, we successfully integrated multiple LC memories onto a single chip within a Cs vapor cell, achieving consistent performance across all devices. We conducted a detailed investigation into storage efficiency, analyzing memory lifetime and bandwidth. These results represent a significant advancement toward spatially multiplexed quantum memories and have the potential to elevate memory integration to unprecedented levels. We anticipate applications in parallel single-photon synchronization for quantum repeater nodes and photonic quantum computing platforms.
References in corpus (31)
- The Quantum Internet
- Classical Analog of Electromagnetically Induced Transparency
- Quantum repeaters: From quantum networks to the quantum internet
- Telecom-heralded entanglement between remote multimode solid-state quantum memories
- Heralded entanglement distribution between two absorptive quantum memories
- Highly efficient optical quantum memory with long coherence time in cold atoms
- Highly-Efficient Quantum Memory for Polarization Qubits in a Spatially-Multiplexed Cold Atomic Ensemble
- Light storage for one second at room temperature
- Quantum Storage of Frequency-Multiplexed Heralded Single Photons
- High-speed noise-free optical quantum memory
- A practical guide to electromagnetically induced transparency in atomic vapor
- Simple atomic quantum memory suitable for semiconductor quantum dot single photons
- Non-Gaussian and Gottesman-Kitaev-Preskill state preparation by photon catalysis
- Experimental demonstration of memory-enhanced scaling for entanglement connection of quantum repeater segments
- High-performance cavity-enhanced quantum memory with warm atomic cell
- Field-deployable Quantum Memory for Quantum Networking
- A Broadband DLCZ Quantum Memory in Room-Temperature Atoms
- Stationary light pulses and narrowband light storage in a laser-cooled ensemble loaded into a hollow-core fiber
- Single-photon synchronization with a room-temperature atomic quantum memory
- Storing High-Dimensional Quantum States in a Cold Atomic Ensemble
- Ultrahigh and persistent optical depths of caesium in Kagomé-type hollow-core photonic crystal fibres
- Controlled transport of stored light
- A millisecond integrated quantum memory for photonic qubits
- Fiber-compatible photonic feed-forward with 99% fidelity
- Stopped and stationary light at the single-photon level inside a hollow-core fiber
- Long Light Storage Time in an Optical Fiber
- Demonstration of active feedforward one-way quantum computing with photon-matter hyperentanglement
- Controlling a nuclear spin in a nanodiamond
- Optimization and readout-noise analysis of a warm vapor EIT memory on the Cs D1 line
- High vacuum compatible fiber feedthrough for hot alkali vapor cells
- Near-perfect broadband quantum memory enabled by intelligent spinwave compaction