Storage of telecom-C-band heralded single photons with orbital-angular-momentum encoding in a crystal

Hua, Yi-Lin; Yang, Taotao; Zhou, Zong‐Quan; Wang, Jian; Liu, Xiao; Li, Zongfeng; Li, Pei-Yun; Ma, Yu; Liu, Chao; Liang, Peng-Jun; Hu, J.; Li, Xue; Li, Chuan‐Feng; Guo, Guang‐Can

doi:10.1016/j.scib.2019.09.006

Cited by 7 publications

(4 citation statements)

References 56 publications

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“…[ 144 ] Non‐Kramers ions, such as Pr 3 + and Eu 3 + , have a narrow storage bandwidth (MHz to tens of MHz) due to the small hyperfine splitting. Narrow‐band photon sources based on the cavity‐enhanced SPDC [ 57,76,77 ] have been developed to interface with such quantum memories. Similar to the DLCZ protocol, such sources could be used in quantum repeaters, but highly multimode quantum memories would be required to reach practical count rates in the implementation of realistic quantum repeaters.…”

Section: Discussionmentioning

confidence: 99%

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Photonic Integrated Quantum Memory in Rare‐Earth Doped Solids

Zhou,

Liu,

et al. 2023

Laser & Photonics Reviews

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An optical quantum memory is a device that can store photonic quantum information and release it after a controlled time. It is an essential component for overcoming channel losses in large‐scale quantum networks. Optical quantum memories have been demonstrated with various physical systems including atomic gases, single atoms in optical cavities, and rare‐earth‐ion doped solids. Now, quantum memories are marching toward miniaturization and integration for large‐scale practical applications. Solid state systems stand as a natural choice due to the physical stability and ease of micro or nano fabrication using well‐established techniques. In the past decade, considerable efforts have been devoted to developing photonic integrated quantum memories, that is, quantum memories based on micro/nano‐photonic structures manufactured in solids. Remarkable performances have been achieved with integrated quantum memories, with the advantages of lower laser/electric power requirements, small volumes, large storage densities, and easy implementations. In this article, the basic concepts of optical quantum memories, the state‐of‐the‐art technologies for fabricating integrated quantum memories in rare‐earth ions doped crystals, and recent advances are introduced, and the roadmap for developing practically useful devices for applications in quantum networks is discussed.

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Section: Discussionmentioning

confidence: 99%

“…The bandwidth is important for efficiently interfacing with quantum light sources. While these typically have wideband emission, their bandwidth can also be manipulated and compressed with various spectral compression techniques [ 57,73–77 ] to match with the bandwidth of atomic memories.…”

Section: Optical Quantum Memoriesmentioning

confidence: 99%

Photonic Integrated Quantum Memory in Rare‐Earth Doped Solids

Zhou,

Liu,

et al. 2023

Laser & Photonics Reviews

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“…The study of effects of the improved DD method on efficiency would be an interesting topic in the future work. Quantum memories are important in various quantum communication applications 53 , 54 , in particular the quantum secure direct communication 55 , 56 . This method will have important consequences for the goal of quantum networks based on quantum memories 4 – 6 , as well as for the quantum architectures to store and control quantum states using microwave quantum memories 57 , 58 .…”

Section: Discussionmentioning

confidence: 99%

A noise-resisted scheme of dynamical decoupling pulses for quantum memories

Gong

Zhu

et al. 2020

Sci Rep

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Stable quantum memories that capable of storing quantum information for long time scales are an essential building block for an array of potential applications. The long memory time are usually achieved via dynamical decoupling technique involving decoupling of the memory states from its local environment. However, because this process is strongly limited by the errors in the pulses, an noise-protected scheme remains challenging in the field of quantum memories. Here we propose a scheme to design a noise-resisted $$\pi$$ π pulse, which features high fidelity exceeding $$99.9\%$$ 99.9 % under realistic situations. Using this $$\pi$$ π pulse we can generate different dynamical decoupling sequences that preserve high fidelity for long time scales. The versatility, robustness, and potential scalability of this method may allow for various applications in quantum memories technology.

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“…The capacity of the AFC memory to operate in the quantum regime has been demonstrated in a number of experiments including: storage of qubits encoded in polarisation [6][7][8], time-bin [9] and orbital angular momentum [10]; storage of single photons from parametric down conversion sources [8,[11][12][13] and quantum dot sources [14]; storage of photonic entanglement [15] and hyper-entangled states [16]; generation of photonic en-tanglement [17,18]. Large multimode capacity has been also been demonstrated [19,20].…”

mentioning

confidence: 99%

Room Temperature Atomic Frequency Comb Memory for Light

Main,

Hird,

Gao

et al. 2020

Preprint

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We demonstrate coherent storage and retrieval of pulsed light using the atomic frequency comb quantum memory protocol in a room temperature alkali vapour. We utilise velocity-selective optical pumping to prepare multiple velocity classes in the F = 4 hyperfine ground state of caesium. The frequency spacing of the classes is chosen to coincide with the F = 4 − F = 5 hyperfine splitting of the 6 2 P 3/2 excited state resulting in a broadband periodic absorbing structure consisting of two usually Doppler-broadened optical transitions. Weak coherent states of duration 2 ns are mapped into this atomic frequency comb with pre-programmed recall times of 8 ns and 12 ns, with multitemporal mode storage and recall demonstrated. Utilising two transitions in the comb leads to an additional interference effect upon rephasing that enhances the recall efficiency.

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Storage of telecom-C-band heralded single photons with orbital-angular-momentum encoding in a crystal

Cited by 7 publications

References 56 publications

Photonic Integrated Quantum Memory in Rare‐Earth Doped Solids

Photonic Integrated Quantum Memory in Rare‐Earth Doped Solids

A noise-resisted scheme of dynamical decoupling pulses for quantum memories

Room Temperature Atomic Frequency Comb Memory for Light

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