@article{Muniain:152214,
      author        = "Muniain, Unai and Aizpurua, Javier and Hillenbrand, Rainer
                       and Martín-Moreno, Luis and Esteban, Ruben",
      title         = "{Description of ultrastrong light–matter interaction
                       through coupled harmonic oscillator models and their
                       connection with cavity-QED Hamiltonians}",
      year          = "2025",
}