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Quantum memories with high efficiency and fidelity are essential for long-distance quantum communication and information processing. Techniques have been developed for quantum memories based on atomic ensembles. The atomic memories relying…

Quantum Physics · Physics 2019-01-16 Jinxian Guo , Xiaotian Feng , Peiyu Yang , Zhifei Yu , L. Q. Chen , Chun-Hua Yuan , Weiping Zhang

Quantum memories are indispensible for establishing a long-distance quantum network. High-dimensional quantum memories enable a higher channel capacity compared to a quantum memory working in a two-dimensional space, and have a lower…

The spatial modes of light, carrying a quantized amount of orbital angular momentum (OAM), is one of the excellent candidates that provides access to high-dimensional quantum states, which essentially makes it promising towards building…

Quantum Physics · Physics 2021-07-27 Chengyuan Wang , Ya Yu , Yun Chen , Jinwen Wang , Xin Yang , Shuwei Qiu , Dong Wei , Mingtao Cao , Hong Gao , Fuli Li

Quantum machine learning represents a promising avenue for data processing, also for purposes of sequential temporal data analysis, as recently proposed in quantum reservoir computing (QRC). The possibility to operate on several platforms…

Quantum memory is a central component for quantum information processing devices, and will be required to provide high-fidelity storage of arbitrary states, long storage times and small access latencies. Despite growing interest in applying…

Quantum memory systems are vital in quantum information processing for dependable storage and retrieval of quantum states. Inspired by classical reliability theories that synthesize reliable computing systems from unreliable components, we…

Quantum Physics · Physics 2025-12-10 Anuj K. Nayak , Eric Chitambar , Lav R. Varshney

Although photons are robust, room-temperature carriers well suited to quantum machine learning, the absence of photon-photon interactions hinder the realization of memory functionalities that are critical for capturing long-range context.…

Quantum Physics · Physics 2026-02-02 Chaehyeon Lim , Hyungchul Park , Beomjoon Chae , Jeonghun Kwak , Soo-Yeon Lee , Namkyoo Park , Sunkyu Yu

Quantum memory, serving as a crucial device for storing and releasing quantum states, holds significant importance in long-distance quantum communications. Up to date, quantum memories have been realized in many different systems. However,…

Quantum Physics · Physics 2025-02-20 Ming-Shuo Sun , Chun-Hui Zhang , Yi-Zhen Luo , Shuang Wang , Yun Liu , Jian Li , Qin Wang

High-dimensional broadband quantum memory significantly expands quantum information processing capabilities, but the memory efficiency becomes insufficient when extended to high dimensions. We demonstrate an efficient quantum memory for…

Quantum Physics · Physics 2025-09-03 Zeliang Wu , Jinxian Guo , Zhifei Yu , Wenfeng Huang , Chun-Hua Yuan , Weiping Zhang , L. Q. Chen

Random-access quantum memories may offer computational advantages for quantum computers and networks. In this paper, we advance arrays of solid-state quantum memories towards their usage as random-access quantum memory. We perform quantum…

Quantum Physics · Physics 2025-09-16 Markus Teller , Susana Plascencia , Samuele Grandi , Hugues de Riedmatten

Integrated photonic circuits offer great promise for quantum technologies. However, due to the rapid propagation of light, many envisioned applications require efficient on-chip quantum memories with a programmable delay, compact footprint,…

Quantum Physics · Physics 2026-04-02 Stephan Rinner , Jonas Schmitt , Kilian Sandholzer , Andreas Reiserer

We propose how to realize high-fidelity quantum storage using a hybrid quantum architecture including two coupled flux qubits and a nitrogen-vacancy center ensemble (NVE). One of the flux qubits is considered as the quantum computing…

Quantum Physics · Physics 2013-10-22 Xin-You Lü , Ze-Liang Xiang , Wei Cui , J. Q. You , Franco Nori

A quantum state light-storage, using a virtual magnetic field through the ac Stark effect is proposed to combine the high overall storage efficiency and large bandwidth employing room temperature atomic vapor. In this approach, which was…

Quantum Physics · Physics 2020-03-31 Mahmood Sabooni , Mohsen Jafarbeklu , Farrokh Sarreshtehdari

Quantum memories are an integral component of quantum repeaters - devices that will allow the extension of quantum key distribution to communication ranges beyond that permissible by passive transmission. A quantum memory for this…

Quantum Physics · Physics 2020-01-30 B. M. Sparkes , J. Bernu , M. Hosseini , J. Geng , Q. Glorieux , P. A. Altin , P. K. Lam , N. P. Robins , B. C. Buchler

Reversible entanglement transfer between light and matter is a crucial requisite for the ongoing developments of quantum information technologies. Quantum networks and their envisioned applications, e.g., secure communications beyond direct…

Quantum Physics · Physics 2021-04-15 M. Cao , F. Hoffet , S. Qiu , A. S. Sheremet , J. Laurat

We report an experimental realization of an atomic vapor quantum memory for the photonic po- larization qubit. The performance of the quantum memory for the polarization qubit, realized with electromagnetically-induced transparency in two…

Quantum Physics · Physics 2015-05-18 Young-Wook Cho , Yoon-Ho Kim

A quantum memory that can store quantum states faithfully and retrieve them on demand has wide applications in quantum information science. An efficient quantum memory in the microwave regime working alongside quantum processors based on…

Quantum Physics · Physics 2021-11-11 Zenghui Bao , Zhiling Wang , Yukai Wu , Yan Li , Cheng Ma , Yipu Song , Hongyi Zhang , Luming Duan

The faithful storage and coherent manipulation of quantum states with matter-systems enable the construction of large-scale quantum networks based on quantum repeater. To achieve useful communication rates, highly multimode quantum memories…

We provide algorithms for efficiently addressing quantum memory in parallel. These imply that the standard circuit model can be simulated with low overhead by the more realistic model of a distributed quantum computer. As a result, the…

Various near-term quantum networking applications will benefit from low-loss, fiber-coupled photonic quantum memory devices with high efficiencies. We demonstrate a fiber-coupled loop-and-switch quantum memory platform with a pass-through…

Quantum Physics · Physics 2025-10-23 Sandra Cheng , Carson Evans , Todd Pittman