# Gate-Tunable Spectrum and Charge Dispersion Mitigation in a Graphene Superconducting Qubit

https://mdr.nims.go.jp/datasets/84333284-97bd-4978-88cc-8d899286df1a

## File

- [2025A01896G_main.pdf](https://mdr.nims.go.jp/filesets/2b8dfa96-c3a5-40b6-a82a-fe4324bd815b/download) ([Detail](https://mdr.nims.go.jp/filesets/2b8dfa96-c3a5-40b6-a82a-fe4324bd815b.md))

## Id

84333284-97bd-4978-88cc-8d899286df1a

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-07-27T01:20:17.640031Z

## Updated at

2026-07-28T02:06:41.180979Z

## Published at

2026-07-28T03:27:23.134836Z

## Doi



## First published url

https://doi.org/10.1103/3gy7-2r3n

## Date published

2025-12-22

## Recorded date published

2025-12

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Gate-Tunable Spectrum and Charge Dispersion Mitigation in a Graphene Superconducting
    Qubit
  title_type: original
  lang: en

## Description

- description: 'Controlling the energy spectrum of quantum-coherent superconducting
    circuits, i.e., the energies of excited states, the circuit anharmonicity, and
    the states’ charge dispersion, is essential for designing performant qubits. This
    control is usually achieved by adjusting the circuit’s geometry. In situ control
    is traditionally obtained via an external magnetic field, in the case of tunnel
    Josephson junctions. More recently, semiconductor-weak-links-based Josephson junctions
    have emerged as an alternative building block with the advantage of tunability
    via the electric-field effect. Gate-tunable Josephson junctions have been succesfully
    integrated in superconducting circuits using, for instance, semiconducting nanowires
    or two-dimensional electron gases. In this Letter we demonstrate, in a graphene
    superconducting circuit, a large gate tunability of qubit properties: frequency,
    anharmonicity, and charge dispersion. We rationalize these features using a model
    considering the transmission of Cooper pairs through Andreev bound states. Noticeably,
    we show that the high transmission of Cooper pairs in such weak link strongly
    suppresses the charge dispersion. Our Letter illustrates the potential for graphene-based
    qubits as versatile building blocks in advanced quantum circuits.'
  description_type: abstract
  lang: en

## Creator

- name: Nicolas Aparicio
  role: author
- name: Simon Messelot
  role: author
- name: Edgar Bonet-Orozco
  role: author
- name: Eric Eyraud
  role: author
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
- name: Johann Coraux
  role: author
- name: Julien Renard
  role: author

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: Graphene
  schema: not_defined
- subject: Josephson junction
  schema: not_defined
- subject: Superconducting qubit
  schema: not_defined

## Rights

- description: "© 2025 American Physical Society"
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Physical Review Letters
  issn: '10797114'
  volume: '135'
  issue: '26'
  article_number: '266001'

## Conference



## Related item



## Funding

- identifier: ANR-19-CE47-0007
  funder_name: Agence Nationale de la Recherche
- identifier: ANR-22-PETQ-0003
  funder_name: Agence Nationale de la Recherche
- identifier: 21H05233
  funder_name: Japan Society for the Promotion of Science
- identifier: 23H02052
  funder_name: Japan Society for the Promotion of Science
- funder_name: Ministry of Education, Culture, Sports, Science and Technology
- funder_name: World Premier International Research Center Initiative

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## Fileset

- id: 2b8dfa96-c3a5-40b6-a82a-fe4324bd815b
  filename: 2025A01896G_main.pdf
  content_type: application/pdf
  size: 6903595
  md5: 103db3fd700a607e5523173084717a2c

## Thumbnail

fileset_id: 2b8dfa96-c3a5-40b6-a82a-fe4324bd815b
filename: 2025A01896G_main.pdf