期刊
PHYSICAL REVIEW A
卷 97, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.97.042316
关键词
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资金
- UK Engineering and Physical Sciences Research Council [EP/J000051/1, EP/K034480/1]
- EPSRC NQIT Quantum Technology Hub
- Air Force Office of Scientific Research: European Office of Aerospace Research and Development (AFOSR EOARD Grant) [FA8655-09-1-3020]
- Royal Society University Research Fellowship
- EU Marie-Curie Fellowship [PIIF-GA-2013-629229, PIEF-GA-2013-627372]
- European Union Horizon Research and Innovation Framework Programme Marie Curie individual fellowship [705278]
- European Unions Horizon Research and Innovation programme [665148]
- ERC Advanced Grant (MOQUACINO)
- EPSRC via the Controlled Quantum Dynamics CDT [EP/G037043/1, EP/L016524/1]
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Lady Margaret Hall, Oxford
- Consejo Nacional de Ciencia y Tecnologia (CONACyT)
- Banco de Mexico (BM)
- EPSRC [EP/K034480/1, EP/M013243/1, EP/J000051/1] Funding Source: UKRI
- Marie Curie Actions (MSCA) [705278] Funding Source: Marie Curie Actions (MSCA)
Optical quantum memories are devices that store and recall quantum light and are vital to the realization of future photonic quantum networks. To date, much effort has been put into improving storage times and efficiencies of such devices to enable long-distance communications. However, less attention has been devoted to building quantum memories which add zero noise to the output. Even small additional noise can render the memory classical by destroying the fragile quantum signatures of the stored light. Therefore, noise performance is a critical parameter for all quantum memories. Here we introduce an intrinsically noise-free quantum memory protocol based on two-photon off-resonant cascaded absorption (ORCA). We demonstrate successful storage of GHz-bandwidth heralded single photons in a warm atomic vapor with no added noise, confirmed by the unaltered photon-number statistics upon recall. Our ORCA memory meets the stringent noise requirements for quantum memories while combining high-speed and room-temperature operation with technical simplicity, and therefore is immediately applicable to low-latency quantum networks.
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