SELECTED PUBLICATIONS

1. Pure Dephasing of Light-Matter Systems in the Ultrastrong and Deep-Strong Coupling Regimes

   • A. Mercurio, S. Abo, F. Mauceri, E. Russo, V. Macrì, A. Miranowicz, S. Savasta, and O. Di Stefano

   • Phys. Rev. Lett. 130, 123601 2023.

2.  A non-perturbative no-go theorem for photon condensation in approximate models

   •  G. M. Andolina, F. M. D. Pellegrino, A. Mercurio, O. Di Stefano, M. Polini & S. Savasta

   • European Physical Journal Plus, 2022, 137(12), 1348.

3. Gauge-independent emission spectra and quantum correlations in the ultrastrong coupling regime of open system cavity-QED

     W. Salmon , C. Gustin , A. Settineri , O. Di Stefano , D. Zueco , S. Savasta , F. Nori and S. Hughes

3. • Nanophotonics, vol. 11, no. 8, 2022, pp. 1573-1590. https://doi.org/10.1515/nanoph-2021-0718.

4.  Ultrastrong Coupling of a Qubit with a Nonlinear Optical Resonator

 F. Mauceri, A. Mercurio, S. Savasta, O. Di Stefano

Physical Review A 105, 023719 (2022).

5.  Gauge principle and gauge invariance in two-level systems

   • S. Savasta  O. Di Stefano, Settineri A., Zueco D., Hughes S. and,  F. Nori

   • Physical Review A 103, (5), 053703 (2021). 

6.  Gauge freedom, quantum measurements, and time-dependent interactions in cavity QED

   • Settineri A., O. Di Stefano Zueco D., Hughes S,. S. Savasta , and,  F. Nori

   • Physical Review Research 3, (2), 023079 (2021).

7. Thomas–Reiche–Kuhn (TRK) sum rule for interacting photons    

   • S. Savasta  O. Di Stefano, and,  F. Nori

   • Nanophotonics, vol. 10, no. 1, 2021, pp. 465-476 

8. Resolution of Gauge Ambiguities in Ultrastrong-Coupling Cavity QED

   • O. Di Stefano, A. Settineri, V. Macrì, L. Garziano, R. Stassi, S. Savasta, and F. Nori

   • Nature Physics 15 8 803 (2019).

9. Interaction of mechanical oscillators mediated by the exchange of virtual photon pairs

   • O. Di Stefano, A. Settineri, V. Macrì, A. Ridolfo, R. Stassi, A. F. Kockum, S. Savasta, and F. Nori

   • Phys. Rev. Lett. 122, 030402 (2019)

10. Ultrastrong coupling between light and matter

    •  A. F. Kockum, A. Miranowicz, S. De Liberato, S. Savasta, F. Nori

    • Nature Reviews Physics 1, 19 (2019)

11. Non-perturbative Dynamical Casimir Effect in Optomechanical Systems: Vacuum Casimir-Rabi Splittings

    • V. Macrì, A. Ridolfo, O. Di Stefano, A. Frisk Kockum, F. Nori, S. Savasta

    • Physical Review X 8, 011031 (2018)

12. Quantum nonlinear optics without photons

    • R. Stassi, V. Macrì, A. Frisk Kockum, O. Di Stefano, A. Miranowicz, S. Savasta, F. Nori

    • Physical Review A 96, 023818 (2017).

13. Feynman-diagrams approach to the quantum Rabi model for ultrastrong cavity QED: stimulated emission and reabsorption of virtual particles dressing a physical excitation

    • O. Di Stefano, R. Stassi, L. Garziano, A. Frisk Kockum, S. Savasta, F. Nori

    • New Journal of Physics 19, 053010, (2017).

14. One Photon Can Simultaneously Excite Two or More Atoms

    • L. Garziano, V. Macrì, R. Stassi, O. Di Stefano, F. Nori, S. Savasta

    • Physical Review Letters 117, 043601 (2016).

    • doi: 10.1103/PhysRevLett.117.043601

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15. Ultrastrong Coupling of Plasmons and Excitons in a Nanoshell

    • A. Cacciola, O. Di Stefano, R. Stassi, R. Saija, S. Savasta

    • ACS NANO 8,11,11483-11492, (2014).

16. Spontaneous Conversion from Virtual to Real Photons in the Ultrastrong-Coupling Regime

    • R. Stassi,, A. Ridolfo, O. Di Stefano, M. J. Hartmann, S. Savasta

    • Physical Review Letters 110, 6, 243601 (2013).

17. All Optical Switch of Vacuum Rabi Oscillations: The Ultrafast Quantum Eraser

    • A. Ridolfo, R. Vilardi, O. Di Stefano, S. Portolan, S. Savasta

    • Physical Review Letters 106, 013601 (2011)

    • doi: 10.1103/PhysRevLett.106.013601

18. Quantum plasmonics with quantum dot-metal nanoparticle molecules: Influence of the Fano effect on photon statistics

    • A. Ridolfo, O. Di Stefano. N. Fina, R. Saija, S. Savasta

    • Physical Review Letters 105 (26), 263601 (2010).

19. Nanopolaritons: Vacuum Rabi Splitting with a Single Quantum Dot in the Center of a Dimer Nanoantenna

    • S. Savasta, R. Saija, A. Ridolfo, O. Di Stefano, P. Denti F. Borghese

    • ACS Nano 4(11) pp 6369–6376 (2010)

20. Quantum complementarity of microcavity polaritons

    • S. Savasta, O. Di Stefano, V, Savona, W. Langbein

    • Physical Review Letters 94, 246401 (2005).

21. Many-body and correlation effects on parametric polariton amplification in semiconductor microcavities

    • S. Savasta, O. Di Stefano, R. Girlanda

    • Physical Review Letters 90, 096403 (2003)