Ion-photon entanglement and quantum frequency conversion with trapped Ba${}^{+}$ ions

Abstract

Trapped ions are excellent candidates for quantum nodes, as they possess many desirable features of a network node including long-lifetimes, on-site processing capability and produce photonic flying qubits. However, unlike classical networks in which data may be transmitted in optical fibers and the range of communication readily extended with amplifiers, quantum systems often emit photons that have limited propagation range in optical fibers and, by virtue of the nature of a quantum state, cannot be noiselessly amplified. Here, we first describe a method to extract flying qubits from a Ba${}^{+}$ trapped ion via shelving to a long lived, low-lying D-state with higher entanglement probabilities compared with current strong and weak excitation methods. We show a projected fidelity of $\approx$89% of the ion-photon entanglement. We compare several methods of ion-photon entanglement generation and show how the fidelity and entanglement probability varies as a function of the photon collection optic's numerical aperture. We then outline an approach for quantum frequency conversion of the photons emitted by the Ba${}^{+}$ ion to the telecom range for long-distance networking and to 780 nm, for potential entanglement with Rubidium based quantum memories. Our approach is significant for extending the range of quantum networks and for development of hybrid quantum networks compromised of different types of quantum memories.

arXiv comment11 pages, 7 figures

References in corpus (37)

• Experimental loophole-free violation of a Bell inequality using entangled electron spins separated by 1.3 km
• Heralded entanglement between solid-state qubits separated by 3 meters
• Quantum computing with trapped ions
• 14-qubit entanglement: creation and coherence
• Many-body localization in a quantum simulator with programmable random disorder
• Effective quantum spin systems with ion traps
• Demonstration of a small programmable quantum computer with atomic qubits
• Large Scale Modular Quantum Computer Architecture with Atomic Memory and Photonic Interconnects
• Quantum Teleportation Between Distant Matter Qubits
• Long-lived qubit memory using atomic ions
• Robust long-distance entanglement and a loophole-free Bell test with ions and photons
• A quantum information processor with trapped ions
• Modular Entanglement of Atomic Qubits using both Photons and Phonons
• 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 Interference of Photon Pairs from Two Trapped Atomic Ions
• Quantum Frequency Translation of Single-Photon States in Photonic Crystal Fiber
• Integrated optical addressing of an ion qubit
• Quantum Transduction of Telecommunications-band Single Photons from a Quantum Dot by Frequency Upconversion
• Tunable ion-photon entanglement in an optical cavity
• Two-photon interference using background-free quantum frequency conversion of single photons from a semiconductor quantum dot
• Enhanced Quantum Interface with Collective Ion-Cavity Coupling
• A Waveguide Frequency Converter Connecting Rubidium Based Quantum Memories to the Telecom C-Band
• Atom-atom entanglement by single-photon detection
• Imaging trapped ions with a microfabricated lens for quantum information processing
• Planar Ion Trap Geometry for Microfabrication
• A heralded quantum gate between remote quantum memories
• Probabilistic Quantum Gates between Remote Atoms through Interference of Optical Frequency Qubits
• Simulation of a quantum phase transition of polaritons with trapped ions
• Keeping a Single Qubit Alive by Experimental Dynamic Decoupling
• Protocol for Hybrid Entanglement Between a Trapped Atom and a Semiconductor Quantum Dot
• Optimised multi-ion cavity coupling
• Trapped Ion Imaging with a High Numerical Aperture Spherical Mirror
• Precision measurement of branching fractions of ${}^{138}$Ba${}^{+}$: Testing many body theories below one percent level
• Quantum frequency conversion and strong coupling of photonic modes using four-wave mixing in integrated microresonators
• Ion-Photon Entanglement and Bell Inequality Violation with 138Ba+
• Towards a quantum interface between telecommunication and UV wavelengths: design and classical performance

Cited by in corpus (11)

• Quantum interference between photons from an atomic ensemble and a remote atomic ion
• High Purity Single Photons Entangled with an Atomic Memory
• Neutral atom wavelength compatible 780 nm single photons from a trapped ion via quantum frequency conversion
• Ion trap architectures and new directions
• C-band single photons from a trapped ion via two-stage frequency conversion
• 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
• Improving entanglement generation rates in trapped ion quantum networks using nondestructive photon measurement and storage
• Numerical investigation of a segmented-blade ion trap with biasing rods
• Scalable low-latency entanglement distribution for distributed quantum computing
• Doubly-ionized lanthanum as a qubit candidate for quantum networks