2011/08/31 by A. Fedorov, Arkady Fedorov, L. Steffen +7 · 6 citations
Computer Science · Physics and Astronomy · #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum and electron transport phenomena #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1038/nature10713
published as Nature 481, 170-172 (2012) · 4 pages, 5figures
openalex publication_date 2011/12/13 · crossref created 2011/12/13 · crossref issued 2011/12/14 · crossref published 2011/12/14 · crossref published-online 2011/12/14 · crossref published-print 2012/01/01 · arxiv created 2013/02/14 · arxiv updated 2013/02/15 · crossref deposited 2023/05/18 · openalex created_date 2025/10/10 · crossref indexed 2026/07/25 · openalex updated_date 2026/07/28
The quantum Toffoli gate allows universal reversible classical computation. It is also an important primitive in many quantum circuits and quantum error correction schemes. Here we demonstrate the realization of a Toffoli gate with three superconducting transmon qubits coupled to a microwave resonator. By exploiting the third energy level of the transmon qubit, the number of elementary gates needed for the implementation of the Toffoli gate, as well as the total gate time can be reduced significantly in comparison to theoretical proposals using two-level systems only. We characterize the performance of the gate by full process tomography and Monte Carlo process certification. The gate fidelity is found to be 68.5±0.5%.