Robust multi-qubit quantum network node with integrated error detection

Abstract

Long-distance quantum communication and networking require quantum memory nodes with efficient optical interfaces and long memory times. We report the realization of an integrated two-qubit network node based on silicon-vacancy centers (SiVs) in diamond nanophotonic cavities. Our qubit register consists of the SiV electron spin acting as a communication qubit and the strongly coupled 29Si nuclear spin acting as a memory qubit with a quantum memory time exceeding two seconds. By using a highly strained SiV with suppressed electron spin-phonon interactions, we realize electron-photon entangling gates at elevated temperatures up to 1.5 K and nucleus-photon entangling gates up to 4.3 K. Finally, we demonstrate efficient error detection in nuclear spin-photon gates by using the electron spin as a flag qubit, making this platform a promising candidate for scalable quantum repeaters.

arXiv comment24 pages, 19 figures

References in corpus (40)

• The Quantum Internet
• Secure Quantum Key Distribution
• Cavity-based quantum networks with single atoms and optical photons
• Quantum repeaters based on entanglement purification
• Realization of a multi-node quantum network of remote solid-state qubits
• Experimental demonstration of memory-enhanced quantum communication
• All photonic quantum repeaters
• Silicon-Vacancy Spin Qubit in Diamond: A Quantum Memory Exceeding 10 ms with Single-Shot State Readout
• A 10-qubit solid-state spin register with quantum memory up to one minute
• Decoherence-protected quantum gates for a hybrid solid-state spin register
• Entanglement Distillation between Solid-State Quantum Network Nodes
• A Quantum Gate between a Flying Optical Photon and a Single Trapped Atom
• Deterministic Generation of a Cluster State of Entangled Photons
• Fault-tolerant Quantum Communication with Minimal Physical Requirements
• Strain engineering of the silicon-vacancy center in diamond
• Towards a Distributed Quantum Computing Ecosystem
• Electron-phonon processes of the silicon-vacancy centre in diamond
• Quantum network nodes based on diamond qubits with an efficient nanophotonic interface
• Quantum error correction with only two extra qubits
• An integrated nanophotonic quantum register based on silicon-vacancy spins in diamond
• Coherent control of the silicon-vacancy spin in diamond
• Optical signatures of silicon-vacancy spins in diamond
• Optical Interferometry with Quantum Networks
• One-way quantum repeater based on near-deterministic photon-emitter interfaces
• A fiber-coupled diamond quantum nanophotonic interface
• All-optical control of the silicon-vacancy spin in diamond at millikelvin temperatures
• Quantum frequency conversion to telecom of single photons from a nitrogen-vacancy center in diamond
• Multi-Species Trapped Ion Node for Quantum Networking
• Quantum interference of electromechanically stabilized emitters in nanophotonic devices
• Towards a deterministic interface between trapped-ion qubits and travelling photons
• Dephasing mechanisms of diamond-based nuclear-spin memories for quantum networks
• Tunable and Transferable Diamond Membranes for Integrated Quantum Technologies
• Coherence of an optically illuminated single nuclear spin qubit
• Narrow-linewidth tin-vacancy centers in a diamond waveguide
• Heralded quantum gates with integrated error detection in optical cavities
• Frequency control of single quantum emitters in integrated photonic circuits
• Photonic graph state generation from quantum dots and color centers for quantum communications
• Multidimensional cluster states using a single spin-photon interface coupled strongly to an intrinsic nuclear register
• Development of hard masks for reactive ion beam angled etching of diamond
• Optical Entanglement of Distinguishable Quantum Emitters

Cited by in corpus (76)

• Entanglement of Nanophotonic Quantum Memory Nodes in a Telecom Network
• Entanglement-Assisted Quantum Networks: Mechanics, Enabling Technologies, Challenges, and Research Directions
• Metropolitan-scale heralded entanglement of solid-state qubits
• Robust Quantum Memory in a Trapped-Ion Quantum Network Node
• Telecom networking with a diamond quantum memory
• Diamond Integrated Quantum Photonics: A Review
• Tutorial: Remote entanglement protocols for stationary qubits with photonic interfaces
• Microwave Spin Control of a Tin-Vacancy Qubit in Diamond
• Verifiable blind quantum computing with trapped ions and single photons
• Quantum NETwork: from theory to practice
• Germanium Vacancy in Diamond Quantum Memory Exceeding 20 ms
• Deterministic Laser Writing of Spin Defects in Nanophotonic Cavities
• Experimental Generation of Spin-Photon Entanglement in Silicon Carbide
• Ultra-narrow inhomogeneous spectral distribution of telecom-wavelength vanadium centres in isotopically-enriched silicon carbide
• Hybrid Integration of GaP Photonic Crystal Cavities with Silicon-Vacancy Centers in Diamond by Stamp-Transfer
• Universal distributed blind quantum computing with solid-state qubits
• Quantum Photonic Circuits Integrated with Color Centers in Designer Nanodiamonds
• Enhanced Electron Spin Coherence in a GaAs Quantum Emitter
• Nanotube spin defects for omnidirectional magnetic field sensing
• Performance analysis of quantum repeaters enabled by deterministically generated photonic graph states
• Modular chip-integrated photonic control of artificial atoms in diamond nanostructures
• Thresholds for the distributed surface code in the presence of memory decoherence
• Single-Shot Readout of a Nuclear Spin in Silicon Carbide
• Coherent Coupling of a Diamond Tin-Vacancy Center to a Tunable Open Microcavity
• Room-Temperature entangled quantum processor on integrated semiconductor photonics platform
• Realization of a programmable multi-purpose photonic quantum memory with over-thousand qubit manipulations
• Single-Shot Readout and Weak Measurement of a Tin-Vacancy Qubit in Diamond
• Programmable Quantum Processors based on Spin Qubits with Mechanically-Mediated Interactions and Transport
• Heralded initialization of charge state and optical transition frequency of diamond tin-vacancy centers
• Measuring nuclear spin qubits by qudit-enhanced spectroscopy in Silicon Carbide
• Hyperfine spectroscopy and fast, all-optical arbitrary state initialization and readout of a single, ten-level ${}^{73}$Ge vacancy nuclear spin qudit in diamond
• Resource-efficient fault-tolerant one-way quantum repeater with code concatenation
• Large-Range Tuning and Stabilization of the Optical Transition of Diamond Tin-Vacancy Centers by In-Situ Strain Control
• Efficient High-Fidelity Flying Qubit Shaping
• Coherent Control of a Long-Lived Nuclear Memory Spin in a Germanium-Vacancy Multi-Qubit Node
• Fiber-taper collected emission from NV centers in high-$Q/V$ diamond microdisks
• Impact of Annealing and Nanostructuring on Properties of NV Centers Created by Different Techniques
• Qubit teleportation between a memory-compatible photonic time-bin qubit and a solid-state quantum network node
• Realization of a crosstalk-free two-ion node for long-distance quantum networking
• Standalone mobile quantum memory system
• Nuclear Spin Engineering for Quantum Information Science
• Coherent Spins in van der Waals Semiconductor GeS2 at Ambient Conditions
• Phonon-Induced Decoherence in Color-Center Qubits
• Laser-induced spectral diffusion and excited-state mixing of silicon T centres
• Homogeneous Free-Standing Nanostructures from Bulk Diamond over Millimeter Scales for Quantum Technologies
• Control of solid-state nuclear spin qubits using an electron spin-1/2
• Remote Quantum Networks based on Quantum Memories
• Experimentally probing entropy reduction via iterative quantum information transfer
• Fidelity of photon-mediated entanglement between remote nuclear-spin multi-qubit registers
• Modular Architectures and Entanglement Schemes for Error-Corrected Distributed Quantum Computation
• A thermal-noise-resilient microwave quantum network traversing 4 K
• Volcano Architecture for Scalable Quantum Processor Units
• Recovery With Incomplete Knowledge: Fundamental Bounds on Real-Time Quantum Memories
• Scalable, nanoscale positioning of highly coherent color centers in prefabricated diamond nanostructures
• Generating graph states with a single quantum emitter and the minimum number of fusions
• Entanglement Assisted Non-local Optical Interferometry in a Quantum Network
• Engineering chlorine-based emitters in silicon carbide for telecom-band quantum technologies
• Resource-efficient loss-aware photonic graph state preparation using atomic emitters
• A Concise Primer on Solid-State Quantum Emitters
• Secure Quantum Key Distribution Using a Room-Temperature Quantum Emitter
• Digital Twin Simulations Toolbox of the Nitrogen-Vacancy Center in Diamond
• Efficient first-principles inverse design of nanolasers
• Measurement-Based Entanglement Distillation and Constant-Rate Quantum Repeaters over Arbitrary Distances
• Silicon T centre hyperfine structure and memory protection schemes
• Fault-tolerant interfaces for modular quantum computing on diverse qubit platforms
• Qubit-qudit entanglement transfer in defect centers with high-spin nuclei
• Quantum resolution limit of long-baseline imaging using distributed entanglement
• Efficient Quantum Repeater with Single Atoms in Cavities
• Quantum Internet: Resource Estimation for Entanglement Routing
• High-fidelity control of a ${}^{13}$C nuclear spin coupled to a tin-vacancy center in diamond
• Quantum-Processing-Assisted Classical Communications
• RELiQ: Scalable Entanglement Routing via Reinforcement Learning in Quantum Networks
• Quantifying electron-nuclear spin entanglement dynamics in central-spin systems using one-tangles
• Spin-photon Qubits for Scalable Quantum Network
• Quantum memory assisted observable estimation
• Entangling Quantum Memories at Channel Capacity