High-fidelity entanglement between a trapped ion and a telecom photon via quantum frequency conversion

Abstract

Entanglement between a stationary quantum system and a flying qubit is an essential ingredient of a quantum-repeater network. It has been demonstrated for trapped ions, trapped atoms, color centers in diamond, or quantum dots. These systems have transition wavelengths in the blue, red or near-infrared spectral regions, whereas long-range fiber-communication requires wavelengths in the low-loss, low-dispersion telecom regime. A proven tool to interconnect flying qubits at visible/NIR wavelengths to the telecom bands is quantum frequency conversion. Here we use an efficient polarization-preserving frequency converter connecting 854nm to the telecom O-band at 1310nm to demonstrate entanglement between a trapped ${}^{40}$Ca${}^{+}$ ion and the polarization state of a telecom photon with a high fidelity of 98.2 $\pm$ 0.2$\%$. The unique combination of 99.75 $\pm$ 0.18$\%$ process fidelity in the polarization-state conversion, 26.5$\%$ external frequency conversion efficiency and only 11.4 photons/s conversion-induced unconditional background makes the converter a powerful ion-telecom quantum interface.

References in corpus (30)

• An Elementary Quantum Network of Single Atoms in Optical Cavities
• Prescription for experimental determination of the dynamics of a quantum black box
• High-fidelity quantum logic gates using trapped-ion hyperfine qubits
• High-fidelity two-qubit quantum logic gates using trapped calcium-43 ions
• High-Fidelity Universal Gate Set for ${}^9$Be${}^{+}$ Ion Qubits
• A photonic quantum information interface
• Modular Entanglement of Atomic Qubits using both Photons and Phonons
• Single-qubit quantum memory exceeding $10$-minute coherence time
• Quantum teleportation from a telecom-wavelength photon to a solid-state quantum memory
• Visible-to-telecom quantum frequency conversion of light from a single quantum emitter
• Efficient and low-noise single-photon-level frequency conversion interfaces using silicon nanophotonics
• Quantum Transduction of Telecommunications-band Single Photons from a Quantum Dot by Frequency Upconversion
• Tunable ion-photon entanglement in an optical cavity
• Wide-band quantum interface for visible-to-telecommunication wavelength conversion
• Photonic quantum state transfer between a cold atomic gas and a crystal
• Two-photon interference using background-free quantum frequency conversion of single photons from a semiconductor quantum dot
• Waveguide integrated low noise NbTiN nanowire single-photon detectors with milli-Hz dark count rate
• A long-lived Zeeman trapped-ion qubit
• Polarization insensitive frequency conversion for an atom-photon entanglement distribution via a telecom network
• Entanglement of light-shift compensated atomic spin waves with telecom light
• Orbital angular momentum-entanglement frequency transducer
• Polarization-entanglement conserving frequency conversion of photons
• Experimental protocol for high-fidelity heralded photon-to-atom quantum state transfer
• Efficient polarisation-preserving frequency conversion from a trapped-ion-compatible wavelength to the telecom C band
• Telecom-heralded single photon absorption by a single atom
• Non-classical correlations between a C-band telecom photon and a stored spin-wave
• Heralded single excitation of atomic ensemble via solid-state-based telecom photon detection
• Coherence and Entanglement Preservation of Frequency-Converted Heralded Single Photons
• Programmable atom-photon quantum interface
• Quantum interference in the absorption and emission of single photons by a single ion

Cited by in corpus (94)

• Quantum repeaters: From quantum networks to the quantum internet
• Development of Quantum InterConnects for Next-Generation Information Technologies
• Entanglement of two quantum memories via fibers over dozens of kilometres
• High-fidelity spin and optical control of single silicon vacancy centres in silicon carbide
• Quantum networks based on color centers in diamond
• Advances in Space Quantum Communications
• Entangling single atoms over 33 km telecom fibre
• Entanglement of trapped-ion qubits separated by 230 meters
• One-way quantum repeater based on near-deterministic photon-emitter interfaces
• A multinode quantum network over a metropolitan area
• Long-distance distribution of atom-photon entanglement at telecom wavelength
• A silicon-integrated telecom photon-spin interface
• Input-Output Theory with Quantum Pulses
• Light-matter entanglement over 50 km of optical fibre
• Quantum frequency conversion to telecom of single photons from a nitrogen-vacancy center in diamond
• Polarization insensitive frequency conversion for an atom-photon entanglement distribution via a telecom network
• Quantum networks with neutral atom processing nodes
• Entanglement between a diamond spin qubit and a photonic time-bin qubit at telecom wavelength
• Two-photon interference in the telecom C-band after frequency conversion of photons from remote quantum emitters
• Metropolitan-scale heralded entanglement of solid-state qubits
• Towards a deterministic interface between trapped-ion qubits and travelling photons
• Cavity-enhanced quantum network nodes
• Telecom networking with a diamond quantum memory
• Entanglement between a telecom photon and an on-demand multimode solid-state quantum memory
• Entangling metropolitan-distance separated quantum memories
• On-demand indistinguishable single photons from an efficient and pure source based on a Rydberg ensemble
• Telecom-band quantum optics with ytterbium atoms and silicon nanophotonics
• Quantum interactions with pulses of radiation
• Optimising repeater schemes for the quantum internet
• On-demand storage of photonic qubits at telecom wavelengths
• Towards a realization of device-independent quantum key distribution
• Optical Charge Injection and Full Coherent Control of Spin-Qubit in the Telecom C-band Emitting Quantum Dot
• Indistinguishable photons from a trapped-ion quantum network node
• Quantum interference between photons from an atomic ensemble and a remote atomic ion
• High Purity Single Photons Entangled with an Atomic Memory
• Optimal design of diamond-air microcavities for quantum networks using an analytical approach
• Single photon frequency conversion for frequency multiplexed quantum networks in the telecom band
• Quantum optical frequency up-conversion for polarisation entangled qubits: towards interconnected quantum information devices
• Ultratunable quantum frequency conversion in photonic crystal fiber
• Neutral atom wavelength compatible 780 nm single photons from a trapped ion via quantum frequency conversion
• Narrow inhomogeneous distribution of spin-active emitters in silicon carbide
• A perspective on the pathway to a scalable quantum internet using rare-earth ions
• A Spin-Optical Quantum Computing Architecture
• C-band single photons from a trapped ion via two-stage frequency conversion
• Triply-Resonant Sum Frequency Conversion with Gallium Phosphide Ring Resonators
• Telecom Quantum Photonic Interface for a ${}^{40}$Ca${}^{+}$ Single-Ion Quantum Memory
• Quantum frequency conversion based on resonant four-wave mixing
• Demonstration of Slow Light in a Rubidium Vapour Using Single Photons from a Trapped Ion
• Entanglement between a trapped ion qubit and a 780-nm photon via quantum frequency conversion
• Entangling Quantum Memories via Heralded Photonic Bell Measurement
• Experimental realization of a 218-ion multi-qubit quantum memory
• Nonlinear Domain Engineering for Quantum Technologies
• Fast delivery of heralded atom-photon quantum correlation over 12km fiber through multiplexing enhancement
• Entanglement generation in a quantum network with finite quantum memory lifetime
• Resource-efficient frequency conversion for quantum networks via sequential four-wave mixing
• Time-Spatial Mode Selective Quantum Frequency Converter
• A cavity-enhanced broadband photonic Rabi oscillation
• Improving entanglement generation rates in trapped ion quantum networks using nondestructive photon measurement and storage
• Ion-Photonic Frequency Qubit Correlations for Quantum Networks
• Qubit teleportation between a memory-compatible photonic time-bin qubit and a solid-state quantum network node
• Hardware requirements for trapped-ion based verifiable blind quantum computing with a measurement-only client
• Full Bell-basis measurement of an atom-photon 2-qubit state and its application for quantum networks
• Low random duty-cycle errors in periodically-poled KTP revealed by sum-frequency generation
• Quantum Frequency Conversion of $\mu s$-long Photons from the Visible to the Telecom-C-Band
• Group-velocity symmetry in photonic crystal fibre for ultra-tunable quantum frequency conversion
• Remote Quantum Networks based on Quantum Memories
• Photon-mediated entanglement scheme between a ZnO semiconductor defect and a trapped Yb ion
• Hybrid Quantum Repeaters with Ensemble-based Quantum Memories and Single-spin Photon Transducers
• Wavelength conversion for single-photon polarization qubits through continuous variable quantum teleportation
• Uniting Quantum Processing Nodes of Cavity-coupled Ions with Rare-earth Quantum Repeaters Using Single-photon Pulse Shaping Based on Atomic Frequency Comb
• Bound entangled Bell diagonal states of unequal local dimensions, and their witnesses
• Quantum repeater node with free-space coupled trapped ions
• Lifetime-Limited and Tunable Emission from Charge-Stabilized Nickel Vacancy Centers in Diamond
• Fast mixed-species quantum logic gates for trapped-ion quantum networks
• An Integrated Bell-State Analyzer on a Thin Film Lithium Niobate Platform
• Quantum state transfer and input-output theory with time reversal
• Retrieval of single photons from solid-state quantum transducers
• Qubit-environment entanglement in time-dependent pure dephasing
• Subspace Stabilization Analysis for Non-Markovian Open Quantum Systems
• Feasibility of Logical Bell State Generation in Memory Assisted Quantum Networks
• Converting single photons from an InAs/GaAs quantum dot into the ultraviolet: preservation of second-order correlations
• Scalable low-latency entanglement distribution for distributed quantum computing
• Spectrally entangled biphoton state of cascade emissions from a Doppler-broadened atomic ensemble
• Efficient Quantum Frequency Conversion of Ultra-Violet Single Photons from a Trapped Ytterbium Ion
• Spectral shaping of the biphoton state from multiplexed thermal atomic ensembles
• Channel-selective frequency up-conversion for frequency-multiplexed quantum network
• Doubly-ionized lanthanum as a qubit candidate for quantum networks
• 1xN DWDM channel selective quantum frequency conversion
• Heralded photonic graph states with inefficient quantum emitters
• Efficient Quantum Repeater with Single Atoms in Cavities
• Kilometer-Scale Ion-Photon Entanglement with a Metastable ${}^{88}$Sr${}^{+}$ Qubit
• Universality of Short Distance Corrections to Quantum Optics
• Pump-Threshold-Free Frequency Comb via Cavity Floquet Engineering
• Toward quantum interconnects featuring nanometer-to-picometer bandwidth compression and THz-range quantum frequency conversion