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High coherence and low cross-talk in a tileable 3D integrated superconducting circuit architecture

High coherence and low cross-talk in a tileable 3D integrated superconducting circuit architecture
High coherence and low cross-talk in a tileable 3D integrated superconducting circuit architecture

We report high qubit coherence as well as low cross-talk and single-qubit gate errors in a superconducting circuit architecture that promises to be tileable to two-dimensional (2D) lattices of qubits. The architecture integrates an inductively shunted cavity enclosure into a design featuring nongalvanic out-of-plane control wiring and qubits and resonators fabricated on opposing sides of a substrate. The proof-of-principle device features four uncoupled transmon qubits and exhibits average energy relaxation times T1 = 149(38) μs, pure echoed dephasing times Tφ,e = 189(34) μs, and single-qubit gate fidelities F = 99.982(4)% as measured by simultaneous randomized benchmarking. The 3D integrated nature of the control wiring means that qubits will remain addressable as the architecture is tiled to form larger qubit lattices. Band structure simulations are used to predict that the tiled enclosure will still provide a clean electromagnetic environment to enclosed qubits at arbitrary scale.

2375-2548
Spring, Peter A.
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Cao, Shuxiang
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Tsunoda, Takahiro
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Campanaro, Giulio
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Fasciati, Simone
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Wills, James
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Bakr, Mustafa
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Chidambaram, Vivek
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Shteynas, Boris
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Carpenter, Lewis
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Gow, Paul
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Gates, James
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Vlastakis, Brian
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Leek, Peter J.
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Spring, Peter A.
09af290b-0c2d-4285-9605-1c649f1d8224
Cao, Shuxiang
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Tsunoda, Takahiro
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Campanaro, Giulio
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Fasciati, Simone
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Wills, James
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Bakr, Mustafa
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Chidambaram, Vivek
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Shteynas, Boris
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Carpenter, Lewis
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Gow, Paul
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Gates, James
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Vlastakis, Brian
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Leek, Peter J.
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Spring, Peter A., Cao, Shuxiang, Tsunoda, Takahiro, Campanaro, Giulio, Fasciati, Simone, Wills, James, Bakr, Mustafa, Chidambaram, Vivek, Shteynas, Boris, Carpenter, Lewis, Gow, Paul, Gates, James, Vlastakis, Brian and Leek, Peter J. (2022) High coherence and low cross-talk in a tileable 3D integrated superconducting circuit architecture. Science Advances, 8 (16), [abl6698]. (doi:10.1126/sciadv.abl6698).

Record type: Article

Abstract

We report high qubit coherence as well as low cross-talk and single-qubit gate errors in a superconducting circuit architecture that promises to be tileable to two-dimensional (2D) lattices of qubits. The architecture integrates an inductively shunted cavity enclosure into a design featuring nongalvanic out-of-plane control wiring and qubits and resonators fabricated on opposing sides of a substrate. The proof-of-principle device features four uncoupled transmon qubits and exhibits average energy relaxation times T1 = 149(38) μs, pure echoed dephasing times Tφ,e = 189(34) μs, and single-qubit gate fidelities F = 99.982(4)% as measured by simultaneous randomized benchmarking. The 3D integrated nature of the control wiring means that qubits will remain addressable as the architecture is tiled to form larger qubit lattices. Band structure simulations are used to predict that the tiled enclosure will still provide a clean electromagnetic environment to enclosed qubits at arbitrary scale.

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e-pub ahead of print date: 22 April 2022
Published date: 22 April 2022
Additional Information: Publisher Copyright: © 2022 The Authors.

Identifiers

Local EPrints ID: 471086
URI: http://eprints.soton.ac.uk/id/eprint/471086
ISSN: 2375-2548
PURE UUID: 16fa69e2-ebbd-4d01-8047-8f0d89e0e4c2
ORCID for Paul Gow: ORCID iD orcid.org/0000-0002-3247-9082
ORCID for James Gates: ORCID iD orcid.org/0000-0001-8671-5987

Catalogue record

Date deposited: 25 Oct 2022 16:43
Last modified: 30 Oct 2023 02:59

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Contributors

Author: Peter A. Spring
Author: Shuxiang Cao
Author: Takahiro Tsunoda
Author: Giulio Campanaro
Author: Simone Fasciati
Author: James Wills
Author: Mustafa Bakr
Author: Vivek Chidambaram
Author: Boris Shteynas
Author: Lewis Carpenter
Author: Paul Gow ORCID iD
Author: James Gates ORCID iD
Author: Brian Vlastakis
Author: Peter J. Leek

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