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  • Open Access

Graphene Josephson junctions for engineering motional quanta

Zhen-Yang Peng* and Mehdi Abdi†

  • *Contact author: pengzhenyang@sjtu.edu.cn
  • †Contact author: mehabdi@gmail.com
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Phys. Rev. Research 8, 013285 – Published 13 March, 2026

DOI: https://doi.org/10.1103/ry8b-y68x

Abstract

We propose a hybrid quantum device based on the graphene Josephson junctions, where the vibrational degrees of freedom of a graphene membrane couple to the superconducting circuits. The flexural mode-controlled tunneling of the Cooper pairs introduces a strong and tunable coupling even at the zero-point fluctuation level. By employing this interaction, we show that a parametric process can be efficiently implemented. We then investigate foundational and technological applications of our hybrid device empowered by nonlinear interactions, with fast generation of nonclassical mechanical states, and critically enhanced quantum sensing under suitable quantum control. Our work provides the possibility of employing the graphene motional degree of freedom for quantum information processing in circuit quantum nanomechanical structures.

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Phys. Rev. Research 8, 013285– Published 13 March, 2026
  • Received 5 June 2025
  • Revised 25 September 2025
  • Accepted 27 February 2026
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