M
M. A. Sepiol
Researcher at University of Oxford
Publications - 13
Citations - 901
M. A. Sepiol is an academic researcher from University of Oxford. The author has contributed to research in topics: Qubit & Hyperfine structure. The author has an hindex of 6, co-authored 13 publications receiving 700 citations.
Papers
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Journal ArticleDOI
High-Fidelity Quantum Logic Gates Using Trapped-Ion Hyperfine Qubits.
TL;DR: Laser-driven two-qubit and single-qu bit logic gates with respective fidelities 99.9(1)% and 99.9934(3)%, significantly above the ≈99% minimum threshold level required for fault-tolerant quantum computation are demonstrated.
Journal ArticleDOI
High-Fidelity Trapped-Ion Quantum Logic Using Near-Field Microwaves
TL;DR: A dynamically decoupled gate method, which stabilizes the qubits against fluctuating energy shifts and avoids the need to null the microwave field, is introduced and used to produce a Bell state with fidelity 99.7(1)%, after accounting for state preparation and measurement errors.
Journal ArticleDOI
High-fidelity spatial and polarization addressing of Ca-43 qubits using near-field microwave control
D. P. L. Aude Craik,Norbert M. Linke,M. A. Sepiol,T. P. Harty,J. F. Goodwin,C. J. Ballance,D. N. Stacey,Andrew M. Steane,D. M. Lucas,D. T. C. Allcock +9 more
TL;DR: In this article, the authors demonstrate addressing of long-lived qubits held in separate zones of a microfabricated surface trap with integrated microwave electrodes, and measure a ratio of Rabi frequencies between addressed and nonaddressed qubits of up to 1400.
Journal ArticleDOI
Probing qubit memory errors at the part-per-million level
M. A. Sepiol,A. C. Hughes,J. E. Tarlton,D. P. Nadlinger,T. G. Ballance,C. J. Ballance,T. P. Harty,Andrew M. Steane,J. F. Goodwin,D. M. Lucas +9 more
TL;DR: In this paper, the authors measured the memory error for a trapped-ion qubit in the small-error regime and found that it was 1.2(7)-times smaller than that extrapolated from the randomized benchmarking, and limited by instability of the atomic clock reference.
Dissertation
A high-fidelity microwave driven two-qubit quantum logic gate in 43Ca+
TL;DR: This thesis decribes the experimental implementation of a high-fidelity two-qubit quantum logic gate and presents a simple and robust method for Doppler cooling and obtaining high fluorescence from this qubit in spite of the complicated level structure.