A Hybrid Quantum Memory Enabled Network at Room Temperature

Quantum memory capable of storage and retrieval of flying photons on demand is crucial for developing quantum information technologies. However, the devices needed for long-distance links are quite different from those envisioned for local processing. Here, we present the first hybrid quantum memory...

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Bibliographic Details
Published inarXiv.org
Main Authors Xiao-Ling, Pang, Ai-Lin, Yang, Jian-Peng Dou, Li, Hang, Chao-Ni, Zhang, Poem, Eilon, Saunders, Dylan J, Tang, Hao, Nunn, Joshua, Walmsley, Ian A, Xian-Min, Jin
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 26.02.2020
Subjects
Atomic excitations
Bandwidths
Broadband
Data processing
Mapping
Optical memory (data storage)
Photons
Physics - Optics
Physics - Quantum Physics
Quantum computers
Quantum computing
Quantum phenomena
Quantum theory
Room temperature
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Summary:Quantum memory capable of storage and retrieval of flying photons on demand is crucial for developing quantum information technologies. However, the devices needed for long-distance links are quite different from those envisioned for local processing. Here, we present the first hybrid quantum memory enabled network by demonstrating the interconnection and simultaneous operation of two types of quantum memory: an atomic-ensemble-based memory and an all-optical loop memory. The former generates and stores single atomic excitations that can then be converted to single photons; and the latter maps incoming photons in and out on demand, at room-temperature and with a broad acceptance bandwidth. Interfacing these two types of quantum memories, we observe a well-preserved quantum cross-correlation, reaching a value of 22, and a violation of the Cauchy-Schwarz inequality up to 549 standard deviations. Furthermore, we demonstrate the creation and storage of a fully operable heralded photon chain state that can achieve memory-built-in combining, swapping, splitting, tuning and chopping single photons in a chain temporally. Such a quantum network allows atomic excitations to be generated, stored, and converted to broadband photons, which are then transferred to the next node, stored, and faithfully retrieved, all at high speed and in a programmable fashion.
ISSN:2331-8422
DOI:10.48550/arxiv.1803.07122