Spectroscopy of a synthetic trapped ion qubit

Abstract

${}^{133}{\text{Ba}}^{+}$ has been identified as an attractive ion for quantum information processing due to the unique combination of its spin-1/2 nucleus and visible wavelength electronic transitions. Using a microgram source of radioactive material, we trap and laser-cool the synthetic $A$ = 133 radioisotope of barium II in a radio-frequency ion trap. Using the same, single trapped atom, we measure the isotope shifts and hyperfine structure of the $6^2{\text{P}}_{1/2}$ $\leftrightarrow$ $6^2{\text{S}}_{1/2}$ and $6^2{\text{P}}_{1/2}$ $\leftrightarrow$ $5^2{\text{D}}_{3/2}$ electronic transitions that are needed for laser cooling, state preparation, and state detection of the clock-state hyperfine and optical qubits. We also report the $6^2{\text{P}}_{1/2}$ $\leftrightarrow$ $5^2{\text{D}}_{3/2}$ electronic transition isotope shift for the rare $A$ = 130 and 132 barium nuclides, completing the spectroscopic characterization necessary for laser cooling all long-lived barium II isotopes.

References in corpus (19)

• Observation of a Discrete Time Crystal
• Non-local propagation of correlations in long-range interacting quantum systems
• Demonstration of a small programmable quantum computer with atomic qubits
• High-fidelity preparation, gates, memory and readout of a trapped-ion quantum bit
• Manipulation and Detection of a Trapped Yb+ Ion Hyperfine Qubit
• Emergence and Frustration of Magnetic Order with Variable-Range Interactions in a Trapped Ion Quantum Simulator
• Modular Entanglement of Atomic Qubits using both Photons and Phonons
• High-accuracy optical clock based on the octupole transition in 171Yb+
• Destabilization of dark states and optical spectroscopy in Zeeman-degenerate atomic systems
• Multi-Element Logic Gates for Trapped-Ion Qubits
• Realisation of a programmable two-qubit quantum processor
• Electrodynamically trapped Yb+ ions for quantum information processing
• High-fidelity state detection and tomography of a single ion Zeeman qubit
• Hyperfine and Optical Barium Ion Qubits
• Laser-cooling-assisted mass spectrometry
• Frequency metrology on the 4s 2S1/2 - 4p 2P1/2 transition in the calcium ion for a comparison with quasar data
• Atomic Qubit Manipulations with an Electro-Optic Modulator
• Compact FPGA-based pulse-sequencer and radio-frequency generator for experiments with trapped atoms
• Efficient Photoionization-Loading of Trapped Cadmium Ions with Ultrafast Pulses

Cited by in corpus (24)

• Trapped-Ion Quantum Computing: Progress and Challenges
• Laser Spectroscopy for the Study of Exotic Nuclei
• Noisy intermediate-scale quantum computers
• High fidelity manipulation of a qubit built from a synthetic nucleus
• Opportunities for Fundamental Physics Research with Radioactive Molecules
• Time-Sliced Quantum Circuit Partitioning for Modular Architectures
• Improved isotope-shift-based bounds on bosons beyond the Standard Model through measurements of the ${}^2$D${}_{3/2}{-}^2$D${}_{5/2}$ interval in Ca${}^{+}$
• High Purity Single Photons Entangled with an Atomic Memory
• Leakage mitigation for quantum error correction using a mixed qubit scheme
• Precision measurements on the ${}^{138}$Ba${}^{+}$ $6s^2{S}_{1/2}-5d^2{D}_{5/2}$ clock transition
• Laser Cooling of Radium Ions
• Neutral atom wavelength compatible 780 nm single photons from a trapped ion via quantum frequency conversion
• Entanglement between a trapped ion qubit and a 780-nm photon via quantum frequency conversion
• An extended-cavity diode laser at 497 nm for laser cooling and trapping of neutral strontium
• Isotope-Selective Laser Ablation Ion-Trap Loading of ${}^{137}{\mathrm{Ba}}^{+}$ using a ${\mathrm{BaCl}}_2$ Target
• Direct measurement of the $7s{}^2{S}_{1/2}\to$ $7p{}^2{P}_{3/2}$ transition frequency in ${}^{226}$Ra${}^{+}$
• Ablation loading of barium ions into a surface electrode trap
• Precise many-body calculations and hyperfine interaction effect on dynamic polarizabilities at the low-lying energy levels of Y${}^{2+}$
• An Integrated Bell-State Analyzer on a Thin Film Lithium Niobate Platform
• Theoretical characterisation of the barium II and radium II ions
• Dispersive Jaynes-Cummings Hamiltonian describing a two-level atom interacting with a two-level single mode field
• Improving trapped-ion-qubit memories via code-mediated error-channel balancing
• Laser Cooling and Hyperfine Measurements of Radium-225 Ions
• Non-invasive mid-circuit measurement and reset on atomic qubits