Parametric longitudinal coupling of a semiconductor charge qubit and an rf resonator
In this study, we provide a full experimental characterization of the parametric longitudinal coupling between a complementary metal oxide semiconductor (CMOS) charge qubit and an off-chip rf resonator. Following Corrigan et al., Phys. Rev. Appl. 20, 064005 (2023), we activate parametric longitudinal coupling by driving the charge qubit at the resonator frequency. Managing the crosstalk between the drive applied to the qubit and the resonator allows for the systematic study of the dependence of the longitudinal and dispersive charge-photon couplings on the qubit-resonator detuning and the applied drive. Our experimental estimations of the charge-photon couplings are perfectly reproduced by theoretical simple formulas, without relying on any fitting parameter. We go further by showing a parametric displacement of the resonator's steady state, conditional on the qubit state, and the insensitivity of the longitudinal coupling constant to the photon population of the resonator. Our results pave the way for the exploration of the photon-mediated longitudinal readout and coupling of multiple and distant spins, with long coherent times, in hybrid CMOS circuit quantum electrodynamics architectures.
Authors
- Benoît Bertrand (ORCID: https://orcid.org/0000-0001-5242-2086)
- Boris Brun (ORCID: https://orcid.org/0000-0001-7403-2484)
- S. De Franceschi (ORCID: https://orcid.org/0000-0002-1347-9693)
- Étienne Dumur (ORCID: https://orcid.org/0000-0001-8010-9580)
- V. Champain (ORCID: https://orcid.org/0009-0007-9133-694X)
- Yann‐Michel Niquet (ORCID: https://orcid.org/0000-0002-1846-1396)
- Alessandro Chessari (ORCID: https://orcid.org/0000-0002-6496-2909)
- Simon Zihlmann (ORCID: https://orcid.org/0000-0001-5717-2063)
- Romain Maurand (ORCID: https://orcid.org/0000-0001-7785-1186)
- Clemens B. Winkelmann (ORCID: https://orcid.org/0000-0003-4320-994X)
- Heimanu Niebojewski
- Michele Filippone (ORCID: https://orcid.org/0000-0003-1102-8335)
- Vivien Schmitt (ORCID: https://orcid.org/0000-0002-6495-1679)
- X. Jehl (ORCID: https://orcid.org/0000-0002-5342-9818)
Institutions
- Institut polytechnique de Grenoble (FR)
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- CEA Grenoble (FR)
- Laboratoire d'Électronique des Technologies de l'Information (FR)
- Université Grenoble Alpes (FR)
Publication Details
- Journal
- Physical Review Applied
- Published
- 2025-03-25
- DOI
- https://doi.org/10.1103/physrevapplied.23.034067
- Citations
- 2
- Primary Topic
- Quantum Information and Cryptography
- Type
- article
- Field-Weighted Citation Impact
- 4.96
Funders
- Agence Nationale de la Recherche
- Horizon 2020 Framework Programme