Heralded entanglement distribution between two absorptive quantum memories.

  title={Heralded entanglement distribution between two absorptive quantum memories.},
  author={Xiao Liu and Jun Hu and Zong-Feng Li and Xue Li and Pei-Yun Li and Peng-Jun Liang and Zong-Quan Zhou and Chuan-Feng Li and Guangcan Guo},
  volume={594 7861},
Owing to the inevitable loss in communication channels, the distance of entanglement distribution is limited to approximately 100 kilometres on the ground1. Quantum repeaters can circumvent this problem by using quantum memory and entanglement swapping2. As the elementary link of a quantum repeater, the heralded distribution of two-party entanglement between two remote nodes has only been realized with built-in-type quantum memories3-9. These schemes suffer from the trade-off between… 

Hong-Ou-Mandel Interference between Two Hyper-Entangled Photons Enables Observation of Symmetric and Anti-Symmetric Particle Exchange Phases

Two-photon Hong-Ou-Mandel (HOM) interference is a fundamental quantum effect with no classical counterpart. The exiting researches on two-photon interference were mainly limited in one degree of

Continuous Variable Quantum Teleportation Network

Non-classical correlations over 1250 modes between telecom photons and 979-nm photons stored in 171Yb3+:Y2SiO5

Quantum repeaters based on heralded entanglement require quantum nodes that are able to generate multimode quantum correlations between memories and telecommunication photons. The communication rate

How to choose a qubit

The vast majority of devices for processing quantum information — from communication to computation and sensing — operate with quantum bits. Federico Levi tells us what makes a good qubit.

Advances in entanglement-based QKD for space applications

The most relevant advances in entanglement-based QKD which are implementable over free-space links and thus enable distribution of secure keys from orbit are reviewed.

Long-distance multiplexed quantum teleportation from a telecom photon to a solid-state qubit

Quantum teleportation is an essential capability for quantum networks, al-lowing the transmission of quantum bits (qubits) without a direct exchange of quantum information. Its implementation between

Storage of 1650 modes of single photons at telecom wavelength

fibre. The multiplexing encompasses five spectral channels - each 10 GHz wide - and in each of these up to 330 temporal modes, resulting in the simultaneous storage of 1650 modes of single photons. Our

Advances in device-independent quantum key distribution

The state of the art of DI-QKD is reviewed by highlighting its main theoretical and experimental achievements, discussing the recent proof-of-principle demonstrations, and emphasizing the existing challenges in the technology.



On-Demand Quantum Storage of Photonic Qubits in an On-Chip Waveguide.

On-demand storage of time-bin qubits in an on-chip waveguide memory fabricated on the surface of a ^{151}Eu^{3+}:Y_{2}SiO_{5} crystal, utilizing the Stark-modulated atomic frequency comb protocol is reported.

Long spin coherence times in the ground state and an optically excited state of $^{167}$Er$^{3+}$:Y$_2$SiO$_5$ at zero magnetic field.

Spins in solids are an ideal candidate to act as a memory and interface with superconducting qubits due to their long coherence times. We spectroscopically investigate erbium-167-doped yttrium

Long spin coherence times in the ground state and in an optically excited state of Er3+167:Y2SiO5 at zero magnetic field

Although superconducting qubits are one of the most promising systems for quantum information applications, a separate interface is required to allow for information distribution through optical

Entanglement of two quantum memories via fibres over dozens of kilometres

The entanglement of two atomic-ensemble quantum memories via optical fibres, enabled by the use of cavity enhancement and quantum frequency conversion, is demonstrated over dozens of kilometres.

Hyperfine Structure and Coherent Dynamics of Rare-Earth Spins Explored with Electron-Nuclear Double Resonance at Subkelvin Temperatures

An experimental platform of ultralow-temperature pulsed ENDOR (electron-nuclear double resonance) spectroscopy is constructed for the bulk materials. Coherent property of the coupled electron and

Control and single-shot readout of an ion embedded in a nanophotonic cavity

Spin initialization, coherent optical and spin manipulation, and high-fidelity single-shot optical readout of the hyperfine spin state of single 171 Yb 3+ ions coupled to a nanophotonic cavity fabricated in an yttrium orthovanadate host crystal are demonstrated.

Optical Spin-Wave Storage in a Solid-State Hybridized Electron-Nuclear Spin Ensemble.

The experiment constitutes the first optical storage using spin states in any rare-earth ion with electronic spin, paving the way for rare- earth based quantum memories with high bandwidth, long storage time, and high multimode capacity, a key resource for quantum repeaters.

Entanglement and nonlocality between disparate solid-state quantum memories mediated by photons

Entangling quantum systems with different characteristics through the exchange of photons is a prerequisite for building future quantum networks. Proving the presence of entanglement between quantum

Quantum Repeaters: The Role of Imperfect Local Operations in Quantum Communication

This work presents a scheme of a quantum repeater that connects a string of (imperfect) entangled pairs of particles by using a novel nested purification protocol, thereby creating a single distant pair of high fidelity.

Experimental Entanglement Swapping: Entangling Photons That Never Interacted

We experimentally entangle freely propagating particles that never physically interacted with one another or which have never been dynamically coupled by any other means. This demonstrates that