Efficient quantum memory for single photon polarization qubits

• URL: http://arxiv.org/abs/2004.03123v1
• Date: Tue, 7 Apr 2020 04:39:54 GMT
• Title: Efficient quantum memory for single photon polarization qubits
• Authors: Y. Wang, J. Li, S. Zhang, K. Su, Y. Zhou, K. Liao, S. Du, H. Yan, and S. L. Zhu
• Abstract summary: A quantum memory is a key interface for realizing long-distance quantum communication and large-scale quantum computation. Here, we report the demonstration of a quantum memory for single-photon polarization qubits with an efficiency of >85% and a fidelity of >99 %. For the single-channel quantum memory, the optimized efficiency for storing and retrieving single-photon temporal waveforms can be as high as 90.6 %.
• Score: 0.21670084965090575
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: A quantum memory, for storing and retrieving flying photonic quantum states, is a key interface for realizing long-distance quantum communication and large-scale quantum computation. While many experimental schemes of high storage-retrieval efficiency have been performed with weak coherent light pulses, all quantum memories for true single photons achieved so far have efficiencies far below 50%, a threshold value for practical applications. Here, we report the demonstration of a quantum memory for single-photon polarization qubits with an efficiency of >85% and a fidelity of >99 %, basing on balanced two-channel electromagnetically induced transparency in laser-cooled rubidium atoms. For the single-channel quantum memory, the optimized efficiency for storing and retrieving single-photon temporal waveforms can be as high as 90.6 %. Our result pushes the photonic quantum memory closer to its practical applications in quantum information processing.

Related papers

• 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)
• Quantum Optical Memory for Entanglement Distribution [52.77024349608834]
  Entanglement of quantum states over long distances can empower quantum computing, quantum communications, and quantum sensing. Over the past two decades, quantum optical memories with high fidelity, high efficiencies, long storage times, and promising multiplexing capabilities have been developed.
  arXiv  Detail & Related papers  (2023-04-19T03:18:51Z)
• Deterministic Storage and Retrieval of Telecom Quantum Dot Photons Interfaced with an Atomic Quantum Memory [0.0]
  We store photons from a semiconductor quantum dot in an atomic ensemble quantum memory at telecommunications wavelengths. The signal-to-noise ratio of the retrieved photons is $18.2pm 0.6$, limited only by detector dark counts. This demonstration paves the way to quantum technologies that rely on distributed entanglement, and is especially suited for photonic quantum networks.
  arXiv  Detail & Related papers  (2023-03-07T19:00:01Z)
• Intra-atomic frequency comb based photonic quantum memory using single-atom-cavity setup [0.0]
  We propose a protocol for multi-mode photonic quantum memory using only single-atom-cavity setup. We show that a single atom containing a frequency comb coupled to an optical cavity can store photons efficiently.
  arXiv  Detail & Related papers  (2022-07-21T16:24:30Z)
• Tunable photon-mediated interactions between spin-1 systems [68.8204255655161]
  We show how to harness multi-level emitters with several optical transitions to engineer photon-mediated interactions between effective spin-1 systems. Our results expand the quantum simulation toolbox available in cavity QED and quantum nanophotonic setups.
  arXiv  Detail & Related papers  (2022-06-03T14:52:34Z)
• Efficient, ever-ready quantum memory at room temperature for single photons [0.4047301375093173]
  Quantum memories will be an essential building block of large scale networked quantum systems. Memory efficiencies above 50% are required to be operating above the quantum no-cloning limit. In this paper we explore the combination of an ultralow spectral bandwidth source of single photons from cavity-enhanced spontaneous parametric down-conversion with a gas-ensemble atomic memory.
  arXiv  Detail & Related papers  (2022-03-23T00:34:18Z)
• On-chip single-photon subtraction by individual silicon vacancy centers in a laser-written diamond waveguide [48.7576911714538]
  Laser-written diamond photonics offers three-dimensional fabrication capabilities and large mode-field diameters matched to fiber optic technology. To realize large cooperativities, we combine excitation of single shallow-implanted silicon vacancy centers via large numerical aperture optics. We demonstrate single-emitter extinction measurements with a cooperativity of 0.153 and a beta factor of 13% yielding 15.3% as lower bound for the quantum efficiency of a single emitter.
  arXiv  Detail & Related papers  (2021-11-02T16:01:15Z)
• 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)
• A bright and fast source of coherent single photons [46.25143811066789]
  A single photon source is a key enabling technology in device-independent quantum communication. We report a single photon source with an especially high system efficiency.
  arXiv  Detail & Related papers  (2020-07-24T17:08:46Z)
• Near-ideal spontaneous photon sources in silicon quantum photonics [55.41644538483948]
  Integrated photonics is a robust platform for quantum information processing. Sources of single photons that are highly indistinguishable and pure, that are either near-deterministic or heralded with high efficiency, have been elusive. Here, we demonstrate on-chip photon sources that simultaneously meet each of these requirements.
  arXiv  Detail & Related papers  (2020-05-19T16:46:44Z)
• Scalable integrated single-photon source [0.0]
  Photonic qubits are key enablers for quantum-information processing deployable across a distributed quantum network. A main challenge is to overcome noise and decoherence processes in order to reach the benchmarks on generation efficiency and photon indistinguishability. We report on the realization of a deterministic single-photon source featuring near-unity indistinguishability using a quantum dot in an 'on-chip' The device produces long strings of $>100$ single photons without any observable decrease in the mutual indistinguishability between photons.
  arXiv  Detail & Related papers  (2020-03-19T17:32:04Z)

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.