Long-distance single photon transmission from a trapped ion via quantum frequency conversion

Abstract

Trapped atomic ions are ideal single photon emitters with long lived internal states which can be entangled with emitted photons. Coupling the ion to an optical cavity enables efficient emission of single photons into a single spatial mode and grants control over their temporal shape. These features are key for quantum information processing and quantum communication. However, the photons emitted by these systems are unsuitable for long-distance transmission due to their wavelengths. Here we report the transmission of single photons from a single ${}^{40}{\text{Ca}}^{+}$ ion coupled to an optical cavity over a 10 km optical fibre via frequency conversion from 866 nm to the telecom C-band at 1,530 nm. We observe non-classical photon statistics of the direct cavity emission, the converted photons and the 10 km transmitted photons, as well as the preservation of the photons' temporal shape throughout. This telecommunication ready system can be a key component for long-distance quantum communication as well as future cloud quantum computation.

References in corpus (17)

• Quantum Communication
• Experimental Demonstration of Blind Quantum Computing
• A photonic quantum information interface
• Towards a global quantum network
• Unconditionally verifiable blind computation
• 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
• Deterministic single-photon source from a single ion
• Entanglement of light-shift compensated atomic spin waves with telecom light
• Single Photons Made-to-Measure
• High-fidelity entanglement swapping and generation of three-qubit GHZ state using asynchronous telecom photon pair sources
• High-fidelity conversion of photonic quantum information to telecommunication wavelength with superconducting single-photon detectors
• Optimised multi-ion cavity coupling
• 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
• Freely Scalable Quantum Technologies using Cells of 5-to-50 Qubits with Very Lossy and Noisy Photonic Links

Cited by in corpus (34)

• Entanglement of two quantum memories via fibers over dozens of kilometres
• Light-matter entanglement over 50 km of optical fibre
• Entanglement between a diamond spin qubit and a photonic time-bin qubit at telecom wavelength
• Towards a deterministic interface between trapped-ion qubits and travelling photons
• Entanglement between a telecom photon and an on-demand multimode solid-state quantum memory
• Indistinguishable photons from a trapped-ion quantum network node
• Fidelity of time-bin entangled multi-photon states from a quantum emitter
• Single photon frequency conversion for frequency multiplexed quantum networks in the telecom band
• Neutral atom wavelength compatible 780 nm single photons from a trapped ion via quantum frequency conversion
• Ultratunable quantum frequency conversion in photonic crystal fiber
• Improving the Indistinguishability of Single Photons from an Ion-Cavity System
• C-band single photons from a trapped ion via two-stage frequency conversion
• Triply-Resonant Sum Frequency Conversion with Gallium Phosphide Ring Resonators
• 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
• Nonlinear Domain Engineering for Quantum Technologies
• Resource-efficient frequency conversion for quantum networks via sequential four-wave mixing
• Tunable quantum beat of single photons enabled by nonlinear nanophotonics
• Realization of a crosstalk-free two-ion node for long-distance quantum networking
• Third-order exceptional point in an ion-cavity system
• Improving entanglement generation rates in trapped ion quantum networks using nondestructive photon measurement and storage
• Frequency-multiplexed storage and distribution of narrowband telecom photon pairs over a 10-km fiber link with long-term system stability
• Low random duty-cycle errors in periodically-poled KTP revealed by sum-frequency generation
• Ultraviolet Fabry-Perot cavity with stable finesse under ultrahigh vacuum conditions
• Simple loss-tolerant protocol for GHZ-state distribution in a quantum network
• Group-velocity symmetry in photonic crystal fibre for ultra-tunable quantum frequency conversion
• Wavelength conversion for single-photon polarization qubits through continuous variable quantum teleportation
• A trapped ion in an optical cavity: numerical study of an optomechanical transition in the few-photon regime
• 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
• Scalable low-latency entanglement distribution for distributed quantum computing
• Spectral shaping of the biphoton state from multiplexed thermal atomic ensembles
• Fiber-integrated Quantum Frequency Conversion for Long-distance Quantum Networking
• Resonator-assisted quantum transduction between superconducting qubits and trapped atomic systems via Rydberg levels