Projekteja vuodessa
Abstrakti
Superconducting qubits seem promising for useful quantum computers, but the currently wide-spread qubit designs and techniques do not yet provide high enough performance. Here, we introduce a superconducting-qubit type, the unimon, which combines the desired properties of increased anharmonicity, full insensitivity to dc charge noise, reduced sensitivity to flux noise, and a simple structure consisting only of a single Josephson junction in a resonator. In agreement with our quantum models, we measure the qubit frequency, ω01/(2π), and increased anharmonicity α/(2π) at the optimal operation point, yielding, for example, 99.9% and 99.8% fidelity for 13 ns single-qubit gates on two qubits with (ω01, α) = (4.49 GHz, 434 MHz) × 2π and (3.55 GHz, 744 MHz) × 2π, respectively. The energy relaxation seems to be dominated by dielectric losses. Thus, improvements of the design, materials, and gate time may promote the unimon to break the 99.99% fidelity target for efficient quantum error correction and possible useful quantum advantage with noisy systems.
Alkuperäiskieli | Englanti |
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Artikkeli | 6895 |
Julkaisu | Nature Communications |
Vuosikerta | 13 |
Numero | 1 |
DOI - pysyväislinkit | |
Tila | Julkaistu - 12 marrask. 2022 |
OKM-julkaisutyyppi | A1 Julkaistu artikkeli, soviteltu |
Sormenjälki
Sukella tutkimusaiheisiin 'Unimon qubit'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.-
ERC ConceptQ: New superconducting quantum-electric device concept utilizing increased anharmonicity, simple structure, and insensitivity to charge and flux noise
Möttönen, M., Vadimov, V., Mörstedt, T., Suominen, H. & Duda, R.
28/10/2022 → 31/10/2027
Projekti: EU: ERC grants
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Aalto: Quantum Technologies Industrial (Aalto)
01/11/2021 → 31/10/2024
Projekti: Business Finland: Strategic centres for science, technology and innovation (SHOK)
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Kvanttiteknologian huippuyksikkö
Möttönen, M., Mäkinen, A., Sevriuk, V., Heinsoo, J., Tuorila, J., Ollikainen, T. & Hazra, D.
01/01/2018 → 31/12/2019
Projekti: Academy of Finland: Other research funding
Laitteet
Lehtileikkeet
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Introducing Unimon: A new superconducting qubit for quantum computers
Eric Hyyppä
16/11/2022
1 kohde/ Medianäkyvyys
Lehdistö/media: Esiintyminen mediassa
Aktiviteetit
- 3 Kutsuttu akateeminen esitelmä
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New superconducting qubit and millikelvin electronics to boost it
Mikko Möttönen (Kutsuttu puhuja)
21 kesäk. 2022Aktiviteetti: Kutsuttu akateeminen esitelmä
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New superconducting qubit and millikelvin electronics to boost it
Mikko Möttönen (Kutsuttu puhuja)
28 kesäk. 2022Aktiviteetti: Kutsuttu akateeminen esitelmä
-
New superconducting qubit and millikelvin electronics to boost it
Mikko Möttönen (Kutsuttu puhuja)
10 kesäk. 2022Aktiviteetti: Kutsuttu akateeminen esitelmä