High-Coherence Fluxonium Qubit
We report superconducting fluxonium qubits with coherence times largely limited by energy relaxation and reproducibly satisfying T_{2}>100 μs (T_{2}>400 μs in one device). Moreover, given the state-of-the-art values of the surface loss tangent and the 1/f flux-noise amplitude, the coherence...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2019-11-01
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| Series: | Physical Review X |
| Online Access: | http://doi.org/10.1103/PhysRevX.9.041041 |
| _version_ | 1829492033559986176 |
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| author | Long B. Nguyen Yen-Hsiang Lin Aaron Somoroff Raymond Mencia Nicholas Grabon Vladimir E. Manucharyan |
| author_facet | Long B. Nguyen Yen-Hsiang Lin Aaron Somoroff Raymond Mencia Nicholas Grabon Vladimir E. Manucharyan |
| author_sort | Long B. Nguyen |
| collection | DOAJ |
| description | We report superconducting fluxonium qubits with coherence times largely limited by energy relaxation and reproducibly satisfying T_{2}>100 μs (T_{2}>400 μs in one device). Moreover, given the state-of-the-art values of the surface loss tangent and the 1/f flux-noise amplitude, the coherence time can be further improved beyond 1 ms. Our results violate a common viewpoint that the number of Josephson junctions in a superconducting circuit—over 10^{2} here—must be minimized for best qubit coherence. We outline how the unique to fluxonium combination of long coherence time and large anharmonicity can benefit both gate-based and adiabatic quantum computing. |
| first_indexed | 2024-12-15T00:48:42Z |
| format | Article |
| id | doaj.art-5428f76bd89248afa66cc55e604b8de1 |
| institution | Directory Open Access Journal |
| issn | 2160-3308 |
| language | English |
| last_indexed | 2024-12-15T00:48:42Z |
| publishDate | 2019-11-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review X |
| spelling | doaj.art-5428f76bd89248afa66cc55e604b8de12022-12-21T22:41:29ZengAmerican Physical SocietyPhysical Review X2160-33082019-11-019404104110.1103/PhysRevX.9.041041High-Coherence Fluxonium QubitLong B. NguyenYen-Hsiang LinAaron SomoroffRaymond MenciaNicholas GrabonVladimir E. ManucharyanWe report superconducting fluxonium qubits with coherence times largely limited by energy relaxation and reproducibly satisfying T_{2}>100 μs (T_{2}>400 μs in one device). Moreover, given the state-of-the-art values of the surface loss tangent and the 1/f flux-noise amplitude, the coherence time can be further improved beyond 1 ms. Our results violate a common viewpoint that the number of Josephson junctions in a superconducting circuit—over 10^{2} here—must be minimized for best qubit coherence. We outline how the unique to fluxonium combination of long coherence time and large anharmonicity can benefit both gate-based and adiabatic quantum computing.http://doi.org/10.1103/PhysRevX.9.041041 |
| spellingShingle | Long B. Nguyen Yen-Hsiang Lin Aaron Somoroff Raymond Mencia Nicholas Grabon Vladimir E. Manucharyan High-Coherence Fluxonium Qubit Physical Review X |
| title | High-Coherence Fluxonium Qubit |
| title_full | High-Coherence Fluxonium Qubit |
| title_fullStr | High-Coherence Fluxonium Qubit |
| title_full_unstemmed | High-Coherence Fluxonium Qubit |
| title_short | High-Coherence Fluxonium Qubit |
| title_sort | high coherence fluxonium qubit |
| url | http://doi.org/10.1103/PhysRevX.9.041041 |
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