Entanglement between a telecom photon and an on-demand multimode solid-state quantum memory

Abstract

Entanglement between photons at telecommunication wavelengths and long-lived quantum memories is one of the fundamental requirements of long-distance quantum communication. Quantum memories featuring on-demand read-out and multimode operation are additional precious assets that will benefit the communication rate. In this work we report the first demonstration of entanglement between a telecom photon and a collective spin excitation in a multimode solid-state quantum memory. Photon pairs are generated through widely non-degenerate parametric down-conversion, featuring energy-time entanglement between the telecom-wavelength idler and a visible signal photon. The latter is stored in a Pr${}^{3+}$:Y${}_2$SiO${}_5$ crystal as a spin wave using the full Atomic Frequency Comb scheme. We then recall the stored signal photon and analyze the entanglement using the Franson scheme. We measure conditional fidelities of $92(2)\%$ for excited-state storage, enough to violate a CHSH inequality, and $77(2)\%$ for spin-wave storage. Taking advantage of the on-demand read-out from the spin state, 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.

References in corpus (51)

• Separability Criterion for Density Matrices
• Long-distance quantum communication with atomic ensembles and linear optics
• An Elementary Quantum Network of Single Atoms in Optical Cavities
• Single-Photon Switching and Entanglement of Solid-State Qubits in an Integrated Nanophotonic System
• Multimode quantum memory based on atomic frequency combs
• Quantum Repeaters with Photon Pair Sources and Multi-Mode Memories
• Measurement-Induced Entanglement for Excitation Stored in Remote Atomic Ensembles
• Broadband waveguide quantum memory for entangled photons
• Deterministic delivery of remote entanglement on a quantum network
• Quantum Storage of Photonic Entanglement in a Crystal
• Experimental demonstration of a BDCZ quantum repeater node
• Entanglement Distillation between Solid-State Quantum Network Nodes
• Functional Quantum Nodes for Entanglement Distribution over Scalable Quantum Networks
• Entanglement of two quantum memories via fibers over dozens of kilometres
• Generation of heralded entanglement between distant hole spins
• Telecom-heralded entanglement between remote multimode solid-state quantum memories
• Demonstration of atomic frequency comb memory for light with spin-wave storage
• Heralded entanglement distribution between two absorptive quantum memories
• One-hour coherent optical storage in an atomic frequency comb memory
• Impedance-matched cavity quantum memory
• A solid state spin-wave quantum memory for time-bin qubits
• High-fidelity entanglement between a trapped ion and a telecom photon via quantum frequency conversion
• Entanglement of a photon and a collective atomic excitation
• Ultranarrow-Band Photon Pair Source Compatible with Solid State Quantum Memories and Telecommunication Networks
• Photonic quantum state transfer between a cold atomic gas and a crystal
• Heralded quantum entanglement between two crystals
• Quantum Storage of a Photonic Polarization Qubit in a Solid
• Multiplexed storage and real-time manipulation based on a multiple-degree-of-freedom quantum memory
• Long-distance distribution of atom-photon entanglement at telecom wavelength
• Light-matter entanglement over 50 km of optical fibre
• A Robust Atom-Photon Entanglement Source for Quantum Repeaters
• Quantum Storage of Frequency-Multiplexed Heralded Single Photons
• Towards highly multimode optical quantum memory for quantum repeaters
• Multi-mode and long-lived quantum correlations between photons and spins in a crystal
• A Waveguide Frequency Converter Connecting Rubidium Based Quantum Memories to the Telecom C-Band
• Entanglement between a diamond spin qubit and a photonic time-bin qubit at telecom wavelength
• Phase noise measurements in long fiber interferometers for quantum repeaters applications
• Direct measurement of decoherence for entanglement between a photon and stored atomic excitation
• Solid state source of non-classical photon pairs with embedded multimode quantum memory
• Quantum Storage of Heralded Single Photons in a Praseodymium Doped Crystal
• Entanglement of orbital angular momentum states between an ensemble of cold atoms and a photon
• Efficiency optimization for Atomic Frequency Comb storage
• Long-distance single photon transmission from a trapped ion via quantum frequency conversion
• Laser-written integrated platform for quantum storage of heralded single photons
• Optical storage for 0.53 seconds in a solid-state atomic frequency comb memory using dynamical decoupling
• Quantum correlations between single telecom photons and a multimode on-demand solid state quantum memory
• Generation of light with multimode time-delayed entanglement using storage in a solid state spin-wave quantum memory
• Time Entanglement between a Photon and a Spin Wave in a Multimode Solid-state Quantum Memory
• Entanglement between a photonic time-bin qubit and a collective atomic spin excitation
• Entanglement and non-locality between disparate solid-state quantum memories mediated by photons
• Einstein-Podolsky-Rosen paradox in a hybrid bipartite system

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• Storage of photonic time-bin qubits for up to 20 ms in a rare-earth doped crystal
• Satellite-based Quantum Information Networks: Use cases, Architecture, and Roadmap
• Long-distance multiplexed quantum teleportation from a telecom photon to a solid-state qubit
• Remote distribution of non-classical correlations over 1250 modes between a telecom photon and a ${}^{171}$Yb${}^{3+}$:Y${}_2$SiO${}_5$ crystal
• On-demand storage of photonic qubits at telecom wavelengths
• Multimode capacity of atomic-frequency comb quantum memories
• Storage and analysis of light-matter entanglement in a fibre-integrated system
• Optical quantum memory for noble-gas spins based on spin-exchange collisions
• Coherent optical-microwave interface for manipulation of low-field electronic clock transitions in ${}^{171}$Yb${}^{3+}$:Y${}_2$SiO${}_5$
• Noise suppression in a temporal-multimode quantum memory entangled with a photon via asymmetrical photon-collection channel
• Proposal for spin squeezing in rare-earth ion-doped crystals with a four-color scheme