Realization of a crosstalk-free two-ion node for long-distance quantum networking
arXiv:2405.13369 · doi:10.1103/PhysRevLett.134.070801
Abstract
Trapped atomic ions constitute one of the leading physical platforms for building the quantum repeater nodes to realize large-scale quantum networks. In a long-distance trapped-ion quantum network, it is essential to have crosstalk-free dual-type qubits: one type, called the communication qubit, to establish an entangling interface with telecom photons; and the other type, called the memory qubit, to store quantum information immune from photon scattering under entangling attempts. Here, we report the first experimental implementation of a telecom-compatible and crosstalk-free quantum network node based on two trapped Ca ions. The memory qubit is encoded on a long-lived metastable level to avoid crosstalk with the communication qubit encoded in another subspace of the same ion species, and a quantum wavelength conversion module is employed to generate ion-photon entanglement over a km fiber in a heralded style. Our work therefore constitutes an important step towards the realization of quantum repeaters and long-distance quantum networks.
7 pages, 4 figures
References in corpus (55)
- The Quantum Internet
- Long-distance quantum communication with atomic ensembles and linear optics
- Quantum interface between light and atomic ensembles
- Quantum computation with ions in thermal motion
- Entanglement and quantum computation with ions in thermal motion
- High-fidelity two-qubit quantum logic gates using trapped calcium-43 ions
- High-fidelity quantum logic gates using trapped-ion hyperfine qubits
- A quantum network of clocks
- Large Scale Modular Quantum Computer Architecture with Atomic Memory and Photonic Interconnects
- Distributed Quantum Computation over Noisy Channels
- Creation of entangled states of distant atoms by interference
- Deterministic delivery of remote entanglement on a quantum network
- Towards fault-tolerant quantum computing with trapped ions
- Longer-Baseline Telescopes Using Quantum Repeaters
- Entanglement Distillation between Solid-State Quantum Network Nodes
- A compact ion-trap quantum computing demonstrator
- Entanglement of two quantum memories via fibers over dozens of kilometres
- Single ion-qubit exceeding one hour coherence time
- Isolating and enhancing the emission of single erbium ions using a silicon nanophotonic cavity
- Modular Entanglement of Atomic Qubits using both Photons and Phonons
- Experimental device-independent quantum key distribution between distant users
- High-rate, high-fidelity entanglement of qubits across an elementary quantum network
- Entanglement of Nanophotonic Quantum Memory Nodes in a Telecom Network
- Telecom-heralded entanglement between remote multimode solid-state quantum memories
- High-fidelity gates with mid-circuit erasure conversion in a metastable neutral atom qubit
- A Quantum-Logic Gate between Distant Quantum-Network Modules
- Entanglement of trapped-ion qubits separated by 230 meters
- Robust multi-qubit quantum network node with integrated error detection
- Experimental realization of a multiplexed quantum memory with 225 individually accessible memory cells
- Deterministic single-photon source from a single ion
- Experimental Quantum Communication Overcomes the Rate-loss Limit without Global Phase Tracking
- Long-distance distribution of atom-photon entanglement at telecom wavelength
- Precision Measurement of the Lifetime of the 3d D_{5/2} state in 40Ca+
- A quantum network of entangled optical atomic clocks
- Polarization insensitive frequency conversion for an atom-photon entanglement distribution via a telecom network
- A telecom-wavelength quantum repeater node based on a trapped-ion processor
- Metropolitan-scale heralded entanglement of solid-state qubits
- Sympathetic ground state cooling and coherent manipulation with two-ion-crystals
- Atom-atom entanglement by single-photon detection
- Blueprint for trapped ion quantum computing with metastable states
- Robust Quantum Memory in a Trapped-Ion Quantum Network Node
- Experimental demonstration of memory-enhanced scaling for entanglement connection of quantum repeater segments
- Long-distance single photon transmission from a trapped ion via quantum frequency conversion
- Mid-circuit qubit measurement and rearrangement in a Yb atomic array
- Dynamic control of Purcell enhanced emission of erbium ions in nanoparticles
- Realizing coherently convertible dual-type qubits with the same ion species
- Precision Measurement Method for Branching Fractions of Excited P1/2 States Applied to 40Ca+
- Repetitive readout and real-time control of nuclear spin qubits in Yb atoms
- The Character of Motional Modes for Entanglement and Sympathetic Cooling of Mixed-Species Trapped Ion Chains
- Fast photon-mediated entanglement of continuously-cooled trapped ions for quantum networking
- C-band single photons from a trapped ion via two-stage frequency conversion
- Realization of a programmable multi-purpose photonic quantum memory with over-thousand qubit manipulations
- Fast delivery of heralded atom-photon quantum correlation over 12km fiber through multiplexing enhancement
- Rate-fidelity trade-off in cavity-based remote entanglement generation
- Quantum repeater node with free-space coupled trapped ions