@article{TufarelliFriedrichGrossetal.2021,
  author    = {Tufarelli, Tommaso and Friedrich, Daniel and Groß, Heiko and Hamm, Joachim and Hess, Ortwin and Hecht, Bert},
  title     = {Single quantum emitter Dicke enhancement},
  series = {Physical Review Research},
  volume    = {3},
  journal   = {Physical Review Research},
  doi       = {10.1103/PhysRevResearch.3.033103},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-261459},
  year      = {2021},
  abstract  = {Coupling N identical emitters to the same field mode is a well-established method to enhance light-matter interaction. However, the resulting √N boost of the coupling strength comes at the cost of a "linearized" (effectively semiclassical) dynamics. Here, we instead demonstrate a new approach for enhancing the coupling constant of a single quantum emitter, while retaining the nonlinear character of the light-matter interaction. We consider a single quantum emitter with N nearly degenerate transitions that are collectively coupled to the same field mode. We show that in such conditions an effective Jaynes-Cummings model emerges with a boosted coupling constant of order √N. The validity and consequences of our general conclusions are analytically demonstrated for the instructive case N=2. We further observe that our system can closely match the spectral line shapes and photon autocorrelation functions typical of Jaynes-Cummings physics, proving that quantum optical nonlinearities are retained. Our findings match up very well with recent broadband plasmonic nanoresonator strong-coupling experiments and will, therefore, facilitate the control and detection of single-photon nonlinearities at ambient conditions.},
  language  = {en}
}