Circuit Quantum ElectroDynamics combines superconducting microwave resonators on a chip with natural or artificial quantum objects. Along this line, spins can strongly interact with cavity electromagnetic fields, giving rise to hybridized spin-photon states with coherent dynamics. We study the coupling and the integration of molecular spin centers into planar microwave resonators in order to develop hybrid quantum devices.

Relevant Publications

  • C. Bonizzoni, A. Ghirri, F. Santanni, M. Affronte, Quantum sensing of magnetic fields with molecular spins – npj Quantum Inf. 10, 41 (2024).
  • A. Ghirri, C. Bonizzoni, M. Maksutoglu, A. Mercurio, O. Di Stefano, S. Savasta, M. Affronte, Ultrastrong Magnon-Photon Coupling Achieved by Magnetic Films in Contact with Superconducting Resonators – Phys. Rev. Appl. 20, 024039 (2023).
  • C. Bonizzoni, M. Tincani, F. Santanni and M. Affronte, Machine-Learning-Assisted Manipulation and Readout of Molecular Spin Qubits – Phys. Rev. Appl. 18, 064074 (2022).
  • C. Bonizzoni, M. Maksutoglu, A. Ghirri, J. van Tol, B. Rameev and M. Affronte, Coupling Sub-nanoliter BDPA Organic Radical Spin Ensembles with YBCO Inverse Anapole Resonators – Appl. Magnetic Resonance 2022.
  • F. Moro, M. Moret, A. Ghirri, A. Granados del Águila, Y. Kubozono, L. Beverina and Antonio Cassinese, Room-temperature optically detected magnetic resonance of triplet excitons in a pentacene-doped picene single crystal – J. Materials Research 37, 1269 (2022). . See also: Cover Image
  • C. Bonizzoni, A. Ghirri, S. Nakazawa, S. Nishida, K. Sato, T. Takui and M. Affronte, Transmission Spectroscopy of Molecular Spin Ensembles in the Dispersive Regime – Adv. Quantum Technol. 4, 2100039.
  • C. Bonizzoni, A. Ghirri, F. Santanni, M. Atzori, L. Sorace, R. Sessoli and M. Affronte, Storage and retrieval of microwave pulses with Molecular Spin Ensembles – npj Quantum Inf. 6, 68 (2020).
  • A. Ghirri, C. Herrero, S. Mazérat, T. Mallah, O. Moze and M. Affronte, Coupling Nanostructured CsNiCr Prussian Blue Analogue to Resonant Microwave Fields – Adv. Quantum Technol. 3, 1900101 (2020).
  • C. Bonizzoni, A. Ghirri and M. Affronte, Coherent coupling of molecular spins with microwave photons in planar superconducting resonators – Adv. Phys.-X, 3, 1435305 (2018).
  • C. Bonizzoni, F. Troiani, A. Ghirri and M. Affronte, Microwave dual-mode resonators for coherent spin-photon coupling – J. Appl Phys. 124, 194501 (2018).
  • C. Bonizzoni, A. Ghirri, M. Atzori, L. Sorace, R. Sessoli and M. Affronte, Coherent coupling between Vanadyl Phthalocyanine spin ensemble and microwave photons: towards integration of molecular spin qubits into quantum circuits – Sci. Rep. 7, 13096 (2017).
  • C. Bonizzoni, A. Ghirri, K. Bader, J. Van Slageren, M. Perfetti, L. Sorace, Y. Lan, O. Fuhr, M. Ruben and M. Affronte, Coupling molecular spin centers to microwave planar resonators: towards integration of molecular qubits in quantum circuits – Dalton Trans. 45, 16596 (2016).
  • A. Ghirri, C. Bonizzoni, F. Troiani, N. Buccheri, L. Beverina, A. Cassinese, M. Affronte, Coherently coupling distinct spin ensembles through a high-Tc superconducting resonator – Phys. Rev. A, 93, 063855 (2016).
  • A. Ghirri, C. Bonizzoni, D. Gerace, S. Sanna, A. Cassinese and M. Affronte, YBa2Cu3O7 microwave resonators for strong collective coupling with spin ensembles – Appl. Phys. Lett. 106, 184101 (2015).

Related Projects


Magnetism – Molecular Spins – Microwave – Resonators – Coherent coupling – Cirquit QED – Spectroscopy – Spin Resonance