780 citations · 1.9k across the 12 of their papers we have counts for
12 papers
Precision measurement of the Ca nuclear magnetic moment
R. K. Hanley, D. T. C. Allcock, T. P. Harty +2
We report precision measurements of the nuclear magnetic moment of \textsuperscript{43}Ca\textsuperscript{+}, made by microwave spectroscopy of the 4s S $\left|F=4, M=0…
Probing Qubit Memory Errors at the Part-per-Million Level
M. A. Sepiol, A. C. Hughes, J. E. Tarlton +7
Robust qubit memory is essential for quantum computing, both for near-term devices operating without error correction, and for the long-term goal of a fault-tolerant processor. We…
Magnetic field stabilization system for atomic physics experiments
B. Merkel, K. Thirumalai, J. E. Tarlton +4
Atomic physics experiments commonly use millitesla-scale magnetic fields to provide a quantization axis. As atomic transition frequencies depend on the amplitude of this field, man…
High-fidelity spatial and polarization addressing of Ca-43 qubits using near-field microwave control
D. P. L. Aude Craik, N. M. Linke, M. A. Sepiol +7
Individual addressing of qubits is essential for scalable quantum computation. Spatial addressing allows unlimited numbers of qubits to share the same frequency, whilst enabling ar…
Hybrid quantum logic and a test of Bell's inequality using two different atomic isotopes
C. J. Ballance, V. M. Schaefer, J. P. Home +9
Entanglement is one of the most fundamental properties of quantum mechanics, and is the key resource for quantum information processing. Bipartite entangled states of identical par…
High-fidelity two-qubit quantum logic gates using trapped calcium-43 ions
C. J. Ballance, T. P. Harty, N. M. Linke +1
We study the speed/fidelity trade-off for a two-qubit phase gate implemented in Ca hyperfine trapped-ion qubits. We characterize various error sources contributing to th…
High-fidelity preparation, gates, memory and readout of a trapped-ion quantum bit
T. P. Harty, D. T. C. Allcock, C. J. Ballance +5
We implement all single-qubit operations with fidelities significantly above the minimum threshold required for fault-tolerant quantum computing, using a trapped-ion qubit stored i…
Microwave control electrodes for scalable, parallel, single-qubit operations in a surface-electrode ion trap
D. P. L. Aude Craik, N. M. Linke, T. P. Harty +4
We propose a surface ion trap design incorporating microwave control electrodes for near-field single-qubit control. The electrodes are arranged so as to provide arbitrary frequenc…
A microfabricated ion trap with integrated microwave circuitry
D. T. C. Allcock, T. P. Harty, C. J. Ballance +4
We describe the design, fabrication and testing of a surface-electrode ion trap, which incorporates microwave waveguides, resonators and coupling elements for the manipulation of t…
Reduction of heating rate in a microfabricated ion trap by pulsed-laser cleaning
D T C Allcock, L Guidoni, T P Harty +4
Laser-cleaning of the electrodes in a planar micro-fabricated ion trap has been attempted using ns pulses from a tripled Nd:YAG laser at 355nm. The effect of the laser pulses at se…
Background-free detection of trapped ions
N. M. Linke, D. T. C. Allcock, D. J. Szwer +6
We demonstrate a Doppler cooling and detection scheme for ions with low-lying D levels which almost entirely suppresses scattered laser light background, while retaining a high flu…
Heating rate and electrode charging measurements in a scalable, microfabricated, surface-electrode ion trap
D. T. C. Allcock, T. P. Harty, H. A. Janacek +9
We characterise the performance of a surface-electrode ion "chip" trap fabricated using established semiconductor integrated circuit and micro-electro-mechanical-system (MEMS) micr…