A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Characterization of a quantum bus between two driven qubits
Tekijät: Hijano, Alberto; Lyyra, Henri; Muhonen, Juha T.; Heikkilä, Tero T.
Kustantaja: American Physical Society (APS)
Julkaisuvuosi: 2025
Lehti: Physical Review Research
Artikkelin numero: 043339
Vuosikerta: 7
eISSN: 2643-1564
DOI: https://doi.org/10.1103/y648-4111
Julkaisun avoimuus kirjaamishetkellä: Avoimesti saatavilla
Julkaisukanavan avoimuus : Kokonaan avoin julkaisukanava
Verkko-osoite: https://doi.org/10.1103/y648-4111
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/508167864
We investigate the use of driven qubits coupled to a harmonic oscillator to implement a root iSWAP gate. By dressing the qubits through an external driving field, the qubits and the harmonic oscillator can be selectively coupled, allowing for the measurement of individual qubit states, as well as leading to effective qubit-qubit interactions. We compare the qubit readout on bare and dressed qubits, and demonstrate that when coupled to low-frequency resonators, dressed qubits provide a more robust readout than bare qubits in the presence of damping and thermal effects. Furthermore, we study the impact of various system parameters on the fidelity of the two-qubit gate, identifying an optimal range for quantum computation. Our findings guide the implementation of high-fidelity quantum gates in experimental setups, for example, those employing nanoscale mechanical resonators.
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This work was funded by the Research Council of Finland (Projects No. 354735, No. 321416, and No. 359240) and the European Research Executive Agency (Grant Agreement No. 101202316). We acknowledge grants of computer capacity from the Finnish Grid and Cloud Infrastructure (persistent identifier urn:nbn:fi:research-infras-2016072533). This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant Agreement No. 852428).
