Efficient cavity-assisted storage of photonic qubits in a solid-state quantum memory

• URL: http://arxiv.org/abs/2307.03509v2
• Date: Wed, 23 Oct 2024 17:53:47 GMT
• Title: Efficient cavity-assisted storage of photonic qubits in a solid-state quantum memory
• Authors: Stefano Duranti, Sören Wengerowsky, Leo Feldmann, Alessandro Seri, Bernardo Casabone, Hugues de Riedmatten,
• Abstract summary: We report on the high-efficiency storage and retrieval of weak coherent optical pulses and photonic qubits in a cavity solid-state quantum memory. We store weak coherent pulses at the single photon level with up to 62% efficiency for a pre-determined storage time of 2 $mu$s. We then store weak coherent time-bin qubits with (51+-2)% efficiency and a measurement-device limited fidelity over (94.8+-1.4)% for the retrieved qubits.
• Score: 37.69303106863453
• License:
• Abstract: We report on the high-efficiency storage and retrieval of weak coherent optical pulses and photonic qubits in a cavity-enhanced solid-state quantum memory. By using an atomic frequency comb (AFC) memory in a $Pr^{3+}:Y_2 SO_5$ crystal embedded in a low-finesse impedance-matched cavity, we stored weak coherent pulses at the single photon level with up to 62% efficiency for a pre-determined storage time of 2 $\mu$s. We also confirmed that the impedance-matched cavity enhances the efficiency for longer storage times up to 70 $\mu$s. Taking advantage of the temporal multimodality of the AFC scheme, we then store weak coherent time-bin qubits with (51+-2)% efficiency and a measurement-device limited fidelity over (94.8+-1.4)% for the retrieved qubits. These results represent the most efficient storage in a single photon level AFC memory and the most efficient qubit storage in a solid-state quantum memory up-to-date.

Related papers

• Machine-Learning-Enhanced Quantum Optical Storage in Solids [0.0]
  Solid-state quantum memories can provide broadband storage, but they primarily suffer from low storage efficiency. We use passive optimization and machine learning techniques to demonstrate nearly a 6-fold enhancement in quantum memory efficiency.
  arXiv  Detail & Related papers  (2024-04-05T16:14:54Z)
• High-efficiency, high-speed, and low-noise photonic quantum memory [0.0]
  We present a demonstration of simultaneous high-efficiency, high-speed, and low-noise operation of a photonic quantum memory. We achieve greater than 95% storage efficiency and 26% total efficiency of 880 GHz bandwidth photons, with $mathcalO(10-5)$ noise photons per retrieved pulse.
  arXiv  Detail & Related papers  (2023-09-02T15:34:35Z)
• Limits of single-photon storage in a single $\Lambda$-type atom [8.19841678851784]
  We show that a control field can accelerate the storage process without degrading efficiency too much. For a single-photon pulse propagating in a regular one-dimensional waveguide, the storage efficiency has an upper limit of $50 %$.
  arXiv  Detail & Related papers  (2023-01-04T12:01:09Z)
• Field-deployable Quantum Memory for Quantum Networking [62.72060057360206]
  We present a quantum memory engineered to meet real-world deployment and scaling challenges. The memory technology utilizes a warm rubidium vapor as the storage medium, and operates at room temperature. We demonstrate performance specifications of high-fidelity retrieval (95%) and low operation error $(10-2)$ at a storage time of 160 $mu s$ for single-photon level quantum memory operations.
  arXiv  Detail & Related papers  (2022-05-26T00:33:13Z)
• Multimode capacity of atomic-frequency comb quantum memories [48.7576911714538]
  Ensemble-based quantum memories are key to developing multiplexed quantum repeaters. Rare-earth ion doped crystals are main candidates for highly multimode quantum memories. AFC quantum memory provides large temporal multimode capacity.
  arXiv  Detail & Related papers  (2022-02-24T22:07:01Z)
• Entanglement between a telecom photon and an on-demand multimode solid-state quantum memory [52.77024349608834]
  We show the first demonstration of entanglement between a telecom photon and a collective spin excitation in a multimode solid-state quantum memory. We extend the entanglement storage in the quantum memory for up to 47.7$mu$s, which could allow for the distribution of entanglement between quantum nodes separated by distances of up to 10 km.
  arXiv  Detail & Related papers  (2021-06-09T13:59:26Z)
• Hybrid quantum photonics based on artificial atoms placed inside one hole of a photonic crystal cavity [47.187609203210705]
  Hybrid quantum photonics with SiV$-$-containing nanodiamonds inside one hole of a one-dimensional, free-standing, Si$_3$N$_4$-based photonic crystal cavity is presented. The resulting photon flux is increased by more than a factor of 14 as compared to free-space. Results mark an important step to realize quantum network nodes based on hybrid quantum photonics with SiV$-$- center in nanodiamonds.
  arXiv  Detail & Related papers  (2020-12-21T17:22:25Z)
• Efficient quantum memory for heralded single photons generated by cavity-enhanced spontaneous parametric downconversion [0.0]
  We interface a spontaneous parametric down conversion (SPDC) crystal and a cold atomic ensemble. We demonstrate a highly efficient quantum memory through polarization-encoded single-photon qubits. The results pave the way toward large-scale quantum network.
  arXiv  Detail & Related papers  (2020-11-30T16:19:39Z)
• A Frequency-Multiplexed Coherent Electro-Optic Memory in Rare Earth Doped Nanoparticles [94.37521840642141]
  Quantum memories for light are essential components in quantum technologies like long-distance quantum communication and distributed quantum computing. Recent studies have shown that long optical and spin coherence lifetimes can be observed in rare earth doped nanoparticles. We report on coherent light storage in Eu$3+$:Y$$O$_3$ nanoparticles using the Stark Echo Modulation Memory (SEMM) quantum protocol.
  arXiv  Detail & Related papers  (2020-06-17T13:25:54Z)
• Improved Light-Matter Interaction for Storage of Quantum States of Light in a Thulium-Doped Crystal Cavity [2.8353883265392876]
  We implement an atomic frequency comb quantum memory for 793 nm wavelength photons. Results show a memory efficiency of (27.5$pm$ 2.7)% over a 500 MHz bandwidth. This allows us for the first time to store and recall quantum states of light in such a memory.
  arXiv  Detail & Related papers  (2020-01-30T17:06:17Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.