Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Acta Physica Sinica

Optical echo memory based on photonic crystal cavities

Xue-Yan Xing, Xia-Xia Li, Yuhui Chen, Xiangdong Zhang

Published Jan 1, 2022• 0 citations
Publisher

Abstract

Like internet, connecting quantum computers together to build a full quantum network will enhance the ability to process quantum information. On-chip quantum memories can possess the essential functionalities in building a quantum network, including synchronizing a large number of quantum computers and implementing long-distance quantum communication. However, owning mainly to the constraints imposed by the micro-photonic structures themselves, on-chip quantum memories cannot satisfy the requirement for constructing the full quantum network for the incompatibility of their memory property and integration property. We here propose to build an on-chip quantum memory by using spatial-phase-mismatching effect in photonic crystal cavities. In this scenario, not only is the large orbital angular momentum of photonic crystal cavities utilized to realize photon-echo type memory, but also the light-matter enhancement of a photonic cavity is used to achieve a high-efficiency quantum storage.

DOI
10.7498/aps.70.20220083

Related papers

Integrated optical quantum memory controlled by the electro-optic effect

Xia-Xia Li, Pai Zhou, Yuhui Chen +1 more

Integrated optical quantum memories are a scalable solution to synchronize a large number of quantum nodes. Without compact quantum memories, some astonishing quantum applications such as distributed quantum computing and quantum sensor networks would not be possible. Rather than find a specific material that meets all the requirements of an on-chip quantum memory as other protocols usually do, we propose to assign the memory requirements on coherent storage and controllability to rare-earth ions and a lithium niobate crystal, respectively. Specifically, optical quantum states are stored in an erbium-doped lithium niobate microcavity by utilizing the electro-optic effect of lithium niobate. The cavity frequency can be shifted by an external electric field, thus modifying the resonance condition between the cavity and the collective atomic excitation. This effect is further used to suppress or enhance the emission of photon echoes. Our calculated results show that high efficiency and a low noise performance are achievable.

arXiv:2203.03887•Physical Review A•Jul 18, 2023•8 citations

Topologically protected spatial-phase mismatching for cavity-enhanced quantum memories

Xia-Xia Li, Jia-Xin Wang, Yu‐Hui Chen +1 more

Microphotonic quantum memory presents a promising avenue for miniaturizing and scaling up memories for quantum network applications. While conventional microphotonic cavities can provide enhanced light-matter-interaction to improve the memory efficiency, they are constrained by inherent limitations when utilizing the quantum memory protocol of the revival of silenced echo (ROSE). These limitations primarily arise from the high sensitivity to cavity fabrication imperfections, which scatter stored optical modes into alternate modes and cause a subsequent reduction in efficiency. In this study, we propose that the incorporation of robust edge states and defect states in topological photonic crystals offers a solution to overcome this inherent limitation. The spatial-phase-mismatching effect that underlies ROSE is topologically protected, effectively mitigating the distortion of stored optical states caused by imperfection scattering and improves the memory efficiency.

Physical Review A•Apr 10, 2024•3 citations

Nanophotonic rare-earth quantum memory with optically controlled retrieval

Tian Zhong, Jonathan M. Kindem, John G. Bartholomew +11 more

Optical quantum memories are essential elements in quantum networks for long-distance distribution of quantum entanglement. Scalable development of quantum network nodes requires on-chip qubit storage functionality with control of the readout time. We demonstrate a high-fidelity nanophotonic quantum memory based on a mesoscopic neodymium ensemble coupled to a photonic crystal cavity. The nanocavity enables >95% spin polarization for efficient initialization of the atomic frequency comb memory and time bin-selective readout through an enhanced optical Stark shift of the comb frequencies. Our solid-state memory is integrable with other chip-scale photon source and detector devices for multiplexed quantum and classical information processing at the network nodes.

Science•Aug 31, 2017•341 citations

Orbital angular momentum photonic quantum interface

Zhi‐Yuan Zhou, Yan Li, Dong-Sheng Ding +4 more

Light-carrying orbital angular momentum (OAM) has great potential in enhancing the information channel capacity in both classical and quantum optical communications. Long distance optical communication requires the wavelengths of light are situated in the low-loss communication windows, but most quantum memories currently being developed for use in a quantum repeater work at different wavelengths, so a quantum interface to bridge the wavelength gap is necessary. So far, such an interface for OAM-carried light has not been realized yet. Here, we report the first experimental realization of a quantum interface for a heralded single photon carrying OAM using a nonlinear crystal in an optical cavity. The spatial structures of input and output photons exhibit strong similarity. More importantly, single-photon coherence is preserved during up-conversion as demonstrated.

arXiv:1410.7543•Light Science & Applications•Jan 29, 2016•123 citations

A rare-earth quantum memory

Ian S. Osborne

Quantum Optics The development of global quantum networks will require chip-scale optically addressable quantum memories for quantum state storage, manipulation, and state swapping. Zhong et al. fabricated a nanostructured photonic crystal cavity in a rare-earth-doped material to form a high-fidelity quantum memory (see the Perspective by Waks and Goldschmidt). The cavity enhanced the light-matter interaction, allowing quantum states to be stored and retrieved from the memory on demand. The high fidelity and small footprint of the device offer a powerful building block for a quantum information platform. Science , this issue p. [1392][1]; see also p. [1354][2] [1]: /lookup/doi/10.1126/science.aan5959 [2]: /lookup/doi/10.1126/science.aao2437

Science•Sep 28, 2017•1 citation

Intra-atomic frequency-comb-based photonic quantum memory using single-atom-cavity setup

Chanchal, G. P. Teja, Sandeep K. Goyal

On-demand and efficient storage of photons is an essential element in quantum information processing and long-distance quantum communication. Most of the quantum memory protocols require bulk systems in order to store photons. However, with the advent of integrated photonic chip platforms for quantum information processing, on-chip quantum memories are highly sought after. In this paper, we propose a protocol for multimode photonic quantum memory using only a single-atom-cavity setup. We show that a single atom containing a frequency comb coupled to an optical cavity can store photons efficiently. Further, this scheme can also be used to store polarization states of light. As examples, we show that rubidium and cesium atoms coupled to nanophotonic waveguide cavities can serve as promising candidates to realize our scheme. This provides the possibility of a robust and efficient on-chip quantum memory to be used in integrated photonic chips.

arXiv:2207.10585•Physical Review A•Jan 26, 2023•1 citation
Like internet, connecting quantum computers together to build a full quantum network will enhance the ability to process quantum information. On-chip quantum memories can possess the essential functionalities in building a quantum network, including synchronizing a large number of quantum computers and implementing long-distance quantum communication. However, owning mainly to the constraints imposed by the micro-photonic structures themselves, on-chip quantum memories cannot satisfy the requirement for constructing the full quantum network for the incompatibility of their memory property and integration property. We here propose to build an on-chip quantum memory by using spatial-phase-mismatching effect in photonic crystal cavities. In this scenario, not only is the large orbital angular momentum of photonic crystal cavities utilized to realize photon-echo type memory, but also the light-matter enhancement of a photonic cavity is used to achieve a high-efficiency quantum storage.
Integrated optical quantum memories are a scalable solution to synchronize a large number of quantum nodes. Without compact quantum memories, some astonishing quantum applications such as distributed quantum computing and quantum sensor networks would not be possible. Rather than find a specific material that meets all the requirements of an on-chip quantum memory as other protocols usually do, we propose to assign the memory requirements on coherent storage and controllability to rare-earth ions and a lithium niobate crystal, respectively. Specifically, optical quantum states are stored in an erbium-doped lithium niobate microcavity by utilizing the electro-optic effect of lithium niobate. The cavity frequency can be shifted by an external electric field, thus modifying the resonance condition between the cavity and the collective atomic excitation. This effect is further used to suppress or enhance the emission of photon echoes. Our calculated results show that high efficiency and a low noise performance are achievable.
Microphotonic quantum memory presents a promising avenue for miniaturizing and scaling up memories for quantum network applications. While conventional microphotonic cavities can provide enhanced light-matter-interaction to improve the memory efficiency, they are constrained by inherent limitations when utilizing the quantum memory protocol of the revival of silenced echo (ROSE). These limitations primarily arise from the high sensitivity to cavity fabrication imperfections, which scatter stored optical modes into alternate modes and cause a subsequent reduction in efficiency. In this study, we propose that the incorporation of robust edge states and defect states in topological photonic crystals offers a solution to overcome this inherent limitation. The spatial-phase-mismatching effect that underlies ROSE is topologically protected, effectively mitigating the distortion of stored optical states caused by imperfection scattering and improves the memory efficiency.
Optical quantum memories are essential elements in quantum networks for long-distance distribution of quantum entanglement. Scalable development of quantum network nodes requires on-chip qubit storage functionality with control of the readout time. We demonstrate a high-fidelity nanophotonic quantum memory based on a mesoscopic neodymium ensemble coupled to a photonic crystal cavity. The nanocavity enables >95% spin polarization for efficient initialization of the atomic frequency comb memory and time bin-selective readout through an enhanced optical Stark shift of the comb frequencies. Our solid-state memory is integrable with other chip-scale photon source and detector devices for multiplexed quantum and classical information processing at the network nodes.
Light-carrying orbital angular momentum (OAM) has great potential in enhancing the information channel capacity in both classical and quantum optical communications. Long distance optical communication requires the wavelengths of light are situated in the low-loss communication windows, but most quantum memories currently being developed for use in a quantum repeater work at different wavelengths, so a quantum interface to bridge the wavelength gap is necessary. So far, such an interface for OAM-carried light has not been realized yet. Here, we report the first experimental realization of a quantum interface for a heralded single photon carrying OAM using a nonlinear crystal in an optical cavity. The spatial structures of input and output photons exhibit strong similarity. More importantly, single-photon coherence is preserved during up-conversion as demonstrated.
Quantum Optics The development of global quantum networks will require chip-scale optically addressable quantum memories for quantum state storage, manipulation, and state swapping. Zhong et al. fabricated a nanostructured photonic crystal cavity in a rare-earth-doped material to form a high-fidelity quantum memory (see the Perspective by Waks and Goldschmidt). The cavity enhanced the light-matter interaction, allowing quantum states to be stored and retrieved from the memory on demand. The high fidelity and small footprint of the device offer a powerful building block for a quantum information platform. Science , this issue p. [1392][1]; see also p. [1354][2] [1]: /lookup/doi/10.1126/science.aan5959 [2]: /lookup/doi/10.1126/science.aao2437
On-demand and efficient storage of photons is an essential element in quantum information processing and long-distance quantum communication. Most of the quantum memory protocols require bulk systems in order to store photons. However, with the advent of integrated photonic chip platforms for quantum information processing, on-chip quantum memories are highly sought after. In this paper, we propose a protocol for multimode photonic quantum memory using only a single-atom-cavity setup. We show that a single atom containing a frequency comb coupled to an optical cavity can store photons efficiently. Further, this scheme can also be used to store polarization states of light. As examples, we show that rubidium and cesium atoms coupled to nanophotonic waveguide cavities can serve as promising candidates to realize our scheme. This provides the possibility of a robust and efficient on-chip quantum memory to be used in integrated photonic chips.