Details
| Original language | English |
|---|---|
| Article number | 4679 |
| Journal | Nature Communications |
| Volume | 5 |
| Publication status | Published - 19 Aug 2014 |
| Externally published | Yes |
Abstract
The addressing of a particular qubit within a quantum register is a key pre-requisite for scalable quantum computing. In general, executing a quantum gate with a single qubit, or a subset of qubits, affects the quantum states of all other qubits. This reduced fidelity of the whole-quantum register could prevent the application of quantum error correction protocols and thus preclude scalability. Here we demonstrate addressing of individual qubits within a quantum byte (eight qubits) and measure the error induced in all non-addressed qubits (cross-talk) associated with the application of single-qubit gates. The quantum byte is implemented using microwave-driven hyperfine qubits of 171 Yb + ions confined in a Paul trap augmented with a magnetic gradient field. The measured cross-talk is on the order of 10 a ̂'5 and therefore below the threshold commonly agreed sufficient to efficiently realize fault-tolerant quantum computing. Hence, our results demonstrate how this threshold can be overcome with respect to cross-talk.
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Biochemistry, Genetics and Molecular Biology(all)
- General Biochemistry,Genetics and Molecular Biology
- Physics and Astronomy(all)
- General Physics and Astronomy
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In: Nature Communications, Vol. 5, 4679, 19.08.2014.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A trapped-ion-based quantum byte with 10 -5 next-neighbour cross-talk
AU - Piltz, C.
AU - Sriarunothai, T.
AU - Varón, A. F.
AU - Wunderlich, C.
N1 - Funding Information: We acknowledge funding by the Bundesministerium für Bildung und Forschung (FK 01BQ1012), from the European Community’s Seventh Framework Programme (FP7/ 2007-2013) under Grant Agreement No. 270843 (iQIT), and from Deutsche Forschungsgemeinschaft.
PY - 2014/8/19
Y1 - 2014/8/19
N2 - The addressing of a particular qubit within a quantum register is a key pre-requisite for scalable quantum computing. In general, executing a quantum gate with a single qubit, or a subset of qubits, affects the quantum states of all other qubits. This reduced fidelity of the whole-quantum register could prevent the application of quantum error correction protocols and thus preclude scalability. Here we demonstrate addressing of individual qubits within a quantum byte (eight qubits) and measure the error induced in all non-addressed qubits (cross-talk) associated with the application of single-qubit gates. The quantum byte is implemented using microwave-driven hyperfine qubits of 171 Yb + ions confined in a Paul trap augmented with a magnetic gradient field. The measured cross-talk is on the order of 10 a ̂'5 and therefore below the threshold commonly agreed sufficient to efficiently realize fault-tolerant quantum computing. Hence, our results demonstrate how this threshold can be overcome with respect to cross-talk.
AB - The addressing of a particular qubit within a quantum register is a key pre-requisite for scalable quantum computing. In general, executing a quantum gate with a single qubit, or a subset of qubits, affects the quantum states of all other qubits. This reduced fidelity of the whole-quantum register could prevent the application of quantum error correction protocols and thus preclude scalability. Here we demonstrate addressing of individual qubits within a quantum byte (eight qubits) and measure the error induced in all non-addressed qubits (cross-talk) associated with the application of single-qubit gates. The quantum byte is implemented using microwave-driven hyperfine qubits of 171 Yb + ions confined in a Paul trap augmented with a magnetic gradient field. The measured cross-talk is on the order of 10 a ̂'5 and therefore below the threshold commonly agreed sufficient to efficiently realize fault-tolerant quantum computing. Hence, our results demonstrate how this threshold can be overcome with respect to cross-talk.
UR - http://www.scopus.com/inward/record.url?scp=84907328222&partnerID=8YFLogxK
U2 - 10.1038/ncomms5679
DO - 10.1038/ncomms5679
M3 - Article
AN - SCOPUS:84907328222
VL - 5
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
M1 - 4679
ER -