Efficient Quantum Frequency Conversion of Ultra-Violet Single Photons from a Trapped Ytterbium Ion

Abstract

Ion trap system is a leading candidate for quantum network privileged by its long coherence time, high-fidelity gate operations, and the ion-photon entanglement that generates an ideal pair of a stationary memory qubit and a flying communication qubit. Rapid developments in nonlinear quantum frequency conversion techniques have enhanced the potential for constructing a trapped ion quantum network via optical fiber connections. The generation of long-distance entanglement has been demonstrated with ions such as Ca${}^{+}$ and Ba${}^{+}$, which emit photons in visible or near-infrared range naturally. On the other hand, as the qubit-native photons reside in ultra-violet (UV) spectrum, the Yb${}^{+}$ ion has not been considered as a strong competitor for telecommunication qubits despite extensive research on it. Here, we demonstrate an efficient difference-frequency conversion of UV photons, emitted from a trapped Yb${}^{+}$ ion, into a visible range. We provide experimental evidence that confirms the converted photons are radiated from the Yb${}^{+}$ ion. Our results provide a crucial step toward realizing a long-distance trapped ion quantum network based on Yb${}^{+}$ ions through quantum frequency conversion.

12 pages, 6 figures, 2 tables.; The following article has been accepted by Applied Physics Letters

References in corpus (28)

• Large Scale Modular Quantum Computer Architecture with Atomic Memory and Photonic Interconnects
• Quantum Teleportation Between Distant Matter Qubits
• High-Fidelity Universal Gate Set for ${}^9$Be${}^{+}$ Ion Qubits
• Manipulation and Detection of a Trapped Yb+ Ion Hyperfine Qubit
• A Race Track Trapped-Ion Quantum Processor
• Single ion-qubit exceeding one hour coherence time
• Modular Entanglement of Atomic Qubits using both Photons and Phonons
• Quantum Interference of Photon Pairs from Two Trapped Atomic Ions
• Entanglement of trapped-ion qubits separated by 230 meters
• High-fidelity entanglement between a trapped ion and a telecom photon via quantum frequency conversion
• High-fidelity laser-free universal control of two trapped ion qubits
• High-Fidelity Bell-State Preparation with ${}^{40}$Ca${}^{+}$ Optical Qubits
• Entanglement of Atomic Qubits using an Optical Frequency Comb
• Light-matter entanglement over 50 km of optical fibre
• A telecom-wavelength quantum repeater node based on a trapped-ion processor
• Coherent Error Suppression in Multi-Qubit Entangling Gates
• Benchmarking a trapped-ion quantum computer with 30 qubits
• Long-distance single photon transmission from a trapped ion via quantum frequency conversion
• A heralded quantum gate between remote quantum memories
• Quantum frequency conversion between infrared and ultraviolet
• Precision measurement of the lifetime of the 6p 2P_1/2 level of Yb+
• Protocols and Techniques for a Scalable Atom--Photon Quantum Network
• Efficient Collection of Single Photons Emitted from a Trapped Ion into a Single Mode Fiber for Scalable Quantum Information Processing
• Frequency conversion between UV and telecom wavelengths in a lithium niobate waveguide for quantum communication with Yb+ trapped ions
• Neutral atom wavelength compatible 780 nm single photons from a trapped ion via quantum frequency conversion
• C-band single photons from a trapped ion via two-stage frequency conversion
• Entanglement between a trapped ion qubit and a 780-nm photon via quantum frequency conversion
• Towards a quantum interface between telecommunication and UV wavelengths: design and classical performance