Ultra-strong coupling regime in cavity quantum electrodynamics

    1. S. Ashhab, F. Nori
      Qubit-oscillator systems in the ultrastrong-coupling regime and their potential for preparing nonclassical states
      Phys. Rev. A 81, 042311 (2010). [PDF][Link][arXiv]

    2. X. Cao, J.Q. You, H. Zheng, A.G. Kofman, F. Nori
      Dynamics and quantum Zeno effect for a qubit in either a low- or high-frequency bath beyond the rotating-wave approximation
      Phys. Rev. A 82, 022119 (2010). [PDF][Link][arXiv]

    3. X. Cao, J.Q. You, H. Zheng, F. Nori
      A qubit strongly coupled to a resonant cavity: asymmetry of the spontaneous emission spectrum beyond the rotating wave approximation
      New Journal of Physics 13, 073002 (2011). [PDF][Link][arXiv]

    4. X. Cao, Q. Ai, C.P. Sun, F. Nori
      The transition from quantum Zeno to anti-Zeno effects for a qubit in a cavity by varying the cavity frequency
      Phys. Lett. A 376, pp. 349-357 (2012). [PDF][Link][arXiv]

    5. L. Garziano, R. Stassi, V. Macrì, A.F. Kockum, S. Savasta, F. Nori
      Multiphoton quantum Rabi oscillations in ultrastrong cavity QED
      Phys. Rev. A 92, 063830 (2015). [PDF][Link][arXiv]

    6. M. Cirio, S. De Liberato, N. Lambert, F. Nori
      Ground State Electroluminescence
      Phys. Rev. Lett. 116, 113601 (2016). [PDF][Link][arXiv][Suppl. Info.]

    7. L. Garziano, V. Macrì, R. Stassi, O. Di Stefano, F. Nori, S. Savasta
      One Photon Can Simultaneously Excite Two or More Atoms
      Phys. Rev. Lett. 117, 043601 (2016). [PDF][Link][arXiv][Suppl. Info.]
      Featured in Physics, Editors' Suggestion

    8. R. Stassi, S. Savasta, L. Garziano, B. Spagnolo, F. Nori
      Output field-quadrature measurements and squeezing in ultrastrong cavity-QED
      New Journal of Physics 18, 123005 (2016). [PDF][Link][arXiv]

    9. O. Di Stefano, R. Stassi, L. Garziano, A.F. Kockum, S. Savasta, F. Nori
      Feynman-diagrams approach to the quantum Rabi model for ultrastrong cavity QED: stimulated emission and reabsorption of virtual particles dressing a physical excitation
      New Journal of Physics 19, 053010 (2017). [PDF][Link][arXiv]

    10. A.F. Kockum, A. Miranowicz, V. Macrì, S. Savasta, F. Nori
      Deterministic quantum nonlinear optics with single atoms and virtual photons
      Phys. Rev. A 95, 063849 (2017). [PDF][Link][arXiv]

    11. A.F. Kockum, V. Macrì, L. Garziano, S. Savasta, F. Nori
      Frequency conversion in ultrastrong cavity QED
      Scientific Reports 7, 5313 (2017). [PDF][Link][arXiv][Suppl. Info.]

    12. Z. Chen, Y. Wang, T. Li, L. Tian, Y. Qiu, K. Inomata, F. Yoshihara, S. Han, F. Nori, J.S. Tsai, J.Q. You
      Single-photon-driven high-order sideband transitions in an ultrastrongly coupled circuit-quantum-electrodynamics system
      Phys. Rev. A 96, 012325 (2017). [PDF][Link][arXiv]

    13. M. Cirio, K. Debnath, N. Lambert, F. Nori
      Amplified Optomechanical Transduction of Virtual Radiation Pressure
      Phys. Rev. Lett. 119, 053601 (2017). [PDF][Link][arXiv][Suppl. Info.]

    14. R. Stassi, V. Macrì, A.F. Kockum, O. Di Stefano, A. Miranowicz, S. Savasta, F. Nori
      Quantum Nonlinear Optics without Photons
      Phys. Rev. A 96, 023818 (2017). [PDF][Link][arXiv]

    15. X. Wang, A. Miranowicz, H.R. Li, F. Nori
      Observing pure effects of counter-rotating terms without ultrastrong coupling: A single photon can simultaneously excite two qubits
      Phys. Rev. A 96, 063820 (2017). [PDF][Link][arXiv]

    16. V. Macrì, A. Ridolfo, O. Di Stefano, A.F. Kockum, F. Nori, S. Savasta
      Nonperturbative Dynamical Casimir Effect in Optomechanical Systems: Vacuum Casimir-Rabi Splittings
      Phys. Rev. X 8, 011031 (2018). [PDF][Link][arXiv]

    17. W. Qin, A. Miranowicz, P.B. Li, X.Y. Lu, J.Q. You, F. Nori
      Exponentially Enhanced Light-Matter Interaction, Cooperativities, and Steady-State Entanglement Using Parametric Amplification
      Phys. Rev. Lett. 120, 093601 (2018). [PDF][Link][arXiv][Suppl. Info.]

    18. R. Stassi, F. Nori
      Long-lasting quantum memories: Extending the coherence time of superconducting artificial atoms in the ultrastrong-coupling regime
      Phys. Rev. A 97, 033823 (2018). [PDF][Link][arXiv]

    19. C.S. Muñoz, F. Nori, S. De Liberato
      Resolution of superluminal signalling in non-perturbative cavity quantum electrodynamics
      Nature Communications 9, 1924 (2018). [PDF][Link][arXiv][Suppl. Info.][Reviewers' Comments]

    20. A. Settineri, V. Macrí, A. Ridolfo, O. Di Stefano, A.F. Kockum, F. Nori, S. Savasta
      Dissipation and thermal noise in hybrid quantum systems in the ultrastrong-coupling regime
      Phys. Rev. A 98, 053834 (2018). [PDF][Link][arXiv]

    21. O. Di Stefano, A.F. Kockum, A. Ridolfo, S. Savasta, F. Nori
      Photodetection probability in quantum systems with arbitrarily strong light-matter interaction
      Scientific Reports 8, 17825 (2018). [PDF][Link_1][Link_2][arXiv]

    22. V. Macrì, F. Nori, A.F. Kockum
      Simple preparation of Bell and Greenberger-Horne-Zeilinger states using ultrastrong-coupling circuit QED
      Phys. Rev. A 98, 062327 (2018). [PDF][Link][arXiv]

    23. A.F. Kockum, A. Miranowicz, S. De Liberato, S. Savasta, F. Nori
      Ultrastrong coupling between light and matter
      Nature Reviews Physics 1, pp. 19–40 (2019). [PDF][Link][arXiv]
      This is the only review (plus three technical reviews) of the first issue of this journal.

    24. O. Di Stefano, A. Settineri, V. Macrì, A. Ridolfo, R. Stassi, A.F. Kockum, S. Savasta, F. Nori
      Interaction of Mechanical Oscillators Mediated by the Exchange of Virtual Photon Pairs
      Phys. Rev. Lett. 122, 030402 (2019). [PDF][Link][arXiv][Suppl. Info.]

    25. M. Cirio, N. Shammah, N. Lambert, S.D. Liberato, F. Nori
      Multielectron Ground State Electroluminescence
      Phys. Rev. Lett. 122, 190403 (2019). [PDF][Link][arXiv][Suppl. Info.]

    26. O. Di Stefano, A. Settineri, V. Macrì, L. Garziano, R. Stassi, S. Savasta, F. Nori
      Resolution of gauge ambiguities in ultrastrong-coupling cavity quantum electrodynamics
      Nature Physics 15, pp. 803–808 (2019). [PDF][Link_1][Link_2][arXiv][Suppl. Info.]

    27. A. Settineri, V. Macrì, L. Garziano, O. Di Stefano, F. Nori, S. Savasta
      Conversion of mechanical noise into correlated photon pairs: Dynamical Casimir effect from an incoherent mechanical drive
      Phys. Rev. A 100, 022501 (2019). [PDF][Link][arXiv]

    28. N. Lambert, S. Ahmed, M. Cirio, F. Nori
      Modelling the ultra-strongly coupled spin-boson model with unphysical modes
      Nature Communications 10, 3721 (2019). [PDF][Link_1][Link_2][arXiv][Suppl. Info.][Reviewers' Comments]

    29. S. Endo, Y. Matsuzaki, K. Kakuyanagi, S. Saito, N. Lambert, F. Nori
      Projecting an ultra-strongly-coupled system in a non-energy-eigenbasis with a driven nonlinear resonator
      Scientific Reports 10, 1751 (2020). [PDF][Link_1][Link_2][arXiv]

    30. V. Macri, F. Nori, S. Savasta, D. Zueco
      Spin squeezing by one-photon–two-atom excitation processes in atomic ensembles
      Phys. Rev. A 101, 053818 (2020). [PDF][Link][arXiv]

    31. R. Stassi, M. Cirio, F. Nori
      Scalable quantum computer with superconducting circuits in the ultrastrong coupling regime
      npj Quantum Information 6, 67 (2020). [PDF][Link_1][Link_2][arXiv]

    32. L. Garziano, A. Settineri, O. Di Stefano, S. Savasta, F. Nori
      Gauge invariance of the Dicke and Hopfield models
      Phys. Rev. A 102, 023718 (2020). [PDF][Link][arXiv]

    33. C.S. Munoz, A.F. Kockum, A. Miranowicz, F. Nori
      Simulating ultrastrong-coupling processes breaking parity conservation in Jaynes-Cummings systems
      Phys. Rev. A 102, 033716 (2020). [PDF][Link][arXiv]

    34. W. Qin, Y.H. Chen, X. Wang, A. Miranowicz, F. Nori
      Strong spin squeezing induced by weak squeezing of light inside a cavity
      Nanophotonics 9, pp. 4853–4868 (2020). [PDF][Link][arXiv]

    35. S. Savasta, O. Di Stefano, F. Nori
      Thomas–Reiche–Kuhn (TRK) sum rule for interacting photons
      Nanophotonics 10, pp. 465–476 (2020). [PDF][Link][arXiv]

    36. L. Garziano, A. Ridolfo, A. Miranowicz, G. Falci, S. Savasta, F. Nori
      Atoms in separated resonators can jointly absorb a single photon
      Scientific Reports 10, 21660 (2020). [PDF][Link_1][Link_2][arXiv]

    37. Y.H. Chen, W. Qin, X. Wang, A. Miranowicz, F. Nori
      Shortcuts to Adiabaticity for the Quantum Rabi Model: Efficient Generation of Giant Entangled Cat States via Parametric Amplification
      Phys. Rev. Lett. 126, 023602 (2021). [PDF][Link][arXiv][Suppl. Info.]

    38. A. Settineri, O. Di Stefano, D. Zueco, S. Hughes, S. Savasta, F. Nori
      Gauge freedom, quantum measurements, and time-dependent interactions in cavity QED
      Phys. Rev. Research 3, 023079 (2021). [PDF][Link][arXiv]

    39. F. Minganti, V. Macri, A. Settineri, S. Savasta, F. Nori
      Dissipative state transfer and Maxwell's demon in single quantum trajectories: Excitation transfer between two noninteracting qubits via unbalanced dissipation rates
      Phys. Rev. A 103, 052201 (2021). [PDF][Link][arXiv]

    40. S. Savasta, O. Di Stefano, A. Settineri, D. Zueco, S. Hughes, F. Nori
      Gauge principle and gauge invariance in two-level systems
      Phys. Rev. A 103, 053703 (2021). [PDF][Link][arXiv]

    41. X.L. Dong, P.B. Li, T. Liu, F. Nori
      Unconventional Quantum Sound-Matter Interactions in Spin-Optomechanical-Crystal Hybrid Systems
      Phys. Rev. Lett. 126, 203601 (2021). [PDF][Link][arXiv][Suppl. Info.]

    42. I.I. Arkhipov, F. Minganti, A. Miranowicz, F. Nori
      Generating high-order quantum exceptional points in synthetic dimensions
      Phys. Rev. A 104, 012205 (2021). [PDF][Link][arXiv]

    43. S. Hughes, A. Settineri, S. Savasta, F. Nori
      Resonant Raman scattering of single molecules under simultaneous strong cavity coupling and ultrastrong optomechanical coupling in plasmonic resonators: Phonon-dressed polaritons
      Phys. Rev. B 104, 045431 (2021). [PDF][Link][arXiv]

    44. W. Qin, A. Miranowicz, H. Jing, F. Nori
      Generating Long-Lived Macroscopically Distinct Superposition States in Atomic Ensembles
      Phys. Rev. Lett. 127, 093602 (2021). [PDF][Link][arXiv][Suppl. Info.]

    45. Y.H. Chen, W. Qin, R. Stassi, X. Wang, F. Nori
      Fast binomial-code holonomic quantum computation with ultrastrong light-matter coupling
      Phys. Rev. Research 3, 033275 (2021). [PDF][Link][arXiv]

    46. Y.H. Chen, et al.
      Generation of Fock-State Superpositions and Binomial-Code Holonomic Gates via Dressed Intermediate States in the Ultrastrong Light-Matter Coupling Regime
      preprint, (2021). [arXiv]

    47. V. Macri, F. Minganti, A.F. Kockum, A. Ridolfo, S. Savasta, F. Nori
      Revealing higher-order light and matter energy exchanges using quantum trajectories in ultrastrong coupling
      preprint, (2021). [arXiv]

    48. R. Stassi, M. Cirio, K. Funo, N. Lambert, J. Puebla, F. Nori
      Unveiling and veiling a Schrödinger cat state from the vacuum
      preprint, (2021). [arXiv]

MP4 presentations on “Virtual photons in ultra-strongly coupled systems or Quantum Nonlinear Optics without Photons”:

  • Long Version (~37 minutes) [MP4]
  • Short Version (~27 minutes) [MP4]

PDF files of two brief talks on: virtual photons and the ultrastrong coupling between light and matter.

  • Electroluminescence + Radiation pressure [PDF]
  • Nonlinear quantum optics using real and/or virtual photons [PDF]