High-Fidelity Preparation, Gates, Memory, and Readout of a Trapped-Ion Quantum Bit
University of Oxford · Université Paris Cité · +2 more institutions
Abstract
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 in hyperfine "atomic clock" states of ^{43}Ca^{+}. We measure a combined qubit state preparation and single-shot readout fidelity of 99.93%, a memory coherence time of T_{2}^{*}=50 sec, and an average single-qubit gate fidelity of 99.9999%. These results are achieved in a room-temperature microfabricated surface trap, without the use of magnetic field shielding or dynamic decoupling techniques to overcome technical noise.
Citation impact
- FWCI
- 54.54
- Percentile
- 100%
- References
- 33
Authors
8- TPT. P. HartyCorresponding
University of Oxford
- DTD. T. C. Allcock
University of Oxford
- CJC. J. Ballance
University of Oxford
- LGL. Guidoni
University of Oxford, Université Paris Cité, Laboratoire Matériaux et Phénomènes Quantiques, Centre National de la Recherche Scientifique
- HAH. A. Janacek
University of Oxford
Topics & keywords
- Qubit
- Hyperfine structure
- Physics
- Coherence time
- Quantum computer
- Fidelity
- Coherence (philosophical gambling strategy)
- Decoupling (probability)