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Entanglement between a telecom photon and a room-temperature atomic-vapor quantum memory

Yang Wang, Alexander N. Craddock, Felipe Giraldo +3 more

We report experimental results of entangling a telecom photon and a long-lived atomic quantum memory, a key step in building a quantum repeater for long-distance quantum communications.

Jan 1, 20240 citations

Development of a 7x7 Grid of Absorptive Quantum Memories

Siddharth Sehgal, Eden V. Figueroa, Julián Martínez-Rincón

The ability to effectively store multiple entangled modes is essential to build high repetition-rate long-distance quantum repeaters. We present a multiplexed room-temperature quantum memory system, where we can store up to 49 independent quantum modes.

Quantum 2.0 Conference and ExhibitionJan 1, 20240 citations

Towards Room Temperature Quantum Repeating

Mehdi Namazi, Yang Wang, Alexander N. Craddock +2 more

Here we will discuss our experimental results from entangling telecom photons generated using a four-wave mixing entanglement source with a room-temperature quantum memory. This work paves the way towards building field-deployable quantum repeaters. Full-text article not available; see video presentation

Quantum 2.0 Conference and ExhibitionJan 1, 20240 citations

A high-performance quantum memory for quantum interconnects

H. -X Luo, C. Li, J. -L. Ren +7 more

Single photons are the flying qubits of choice for distributing entanglement in a quantum internet. Quantum memories embedded in quantum repeaters are crucial to overcome transmission loss and enhance the rate of quantum communication. A multimode memory can further boost the channel capacity. However, benchmarking and building a practical quantum memory that simultaneously optimizes multiple performance metrics poses two key challenges. Here, we introduce quantum interconnect rate to comprehensively quantify quantum memories, and further demonstrate a high-performance quantum memory that simultaneously integrates three essential criteria at once: large multimode capacity, high efficiency, and high fidelity. Operating on 11-dimensional spatial modes, our memory achieves a uniform efficiency exceeding 80% and qubit storage fidelities above 99%, enabling the efficient storage of high-dimensional qudits. Based on these capabilities, we estimate a distribution of 3.56 bits of quantum information over a 1000-km repeater link in one minute, highlighting a practical pathway toward scalable quantum interconnects and quantum networks.Single photons are the flying qubits of choice for distributing entanglement in a quantum internet. Quantum memories embedded in quantum repeaters are crucial to overcome transmission loss and enhance the rate of quantum communication. A multimode memory can further boost the channel capacity. However, benchmarking and building a practical quantum memory that simultaneously optimizes multiple performance metrics poses two key challenges. Here, we introduce quantum interconnect rate to comprehensively quantify quantum memories, and further demonstrate a high-performance quantum memory that simultaneously integrates three essential criteria at once: large multimode capacity, high efficiency, and high fidelity. Operating on 11-dimensional spatial modes, our memory achieves a uniform efficiency exceeding 80% and qubit storage fidelities above 99%, enabling the efficient storage of high-dimensional qudits. Based on these capabilities, we estimate a distribution of 3.56 bits of quantum information over a 1000-km repeater link in one minute, highlighting a practical pathway toward scalable quantum interconnects and quantum networks.

quant-pharXiv:2603.01156Physical Review LettersMar 3, 20261 citation

Building a Prototype of a Memory-assisted Quantum Repeater Network

Sonali Gera, Steven Sagona-Stophel, Yuanchi Qing +3 more

We report on progress toward building a first prototype of an entanglement-based Type IT quantum repeater, comprising two cavity enhanced sources of entangled photon pairs, four room temperature Rb vapor quantum memories and a Bell-state measurement station.

Quantum 2.0 Conference and ExhibitionJan 1, 20220 citations

Bell State Measurement Between Photonic Qubits Stored in Two Independent Room Temperature Quantum Memories

Chase Wallace, Sonali Gera, Eden V. Figueroa

We demonstrate the feasibility of entanglement swapping after storage by performing Bell-state measurements on polarization qubits stored in two independent room-temperature quantum memories, a crucial step in developing a quantum repeater.

Quantum 2.0 Conference and ExhibitionJan 1, 20230 citations

Room-temperature quantum memory for quantum repeaters

Abstract

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Room-temperature quantum memory for quantum repeaters

Abstract

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