Two photons everywhere. E. Zubizarreta Casalengua, F. P. Laussy and E. del Valle in Phil. Trans. R. Soc. A 382:20230315 (2024). Pdf-48px.png  What the paper says!?

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This paper explains most of the two-photon structure of resonance fluorescence, in particular, it clarifies for the first time the nature of the circle of antibunching that appears in the two-photon correlation spectrum and which remained mysterious since their first report.[1] The text is written self-consistently, so it requires no acquaintance with our earlier works, in particular the theory of frequency-resolved photon correlations[2] and the theory of interfering quantum fields[3], whose union actually accounts for the said circles.

I wrote a long series (four part) of tweets to break down the content of this paper:

There you can see things one cannot find anywhere else, like Dalibard on steroids [1]:

Dalibard-on-steroids.jpg

References

  1. Two-photon spectra of quantum emitters. A. González-Tudela, F. P. Laussy, C. Tejedor, M. J Hartmann and E. del Valle in New J. Phys. 15:033036 (2013). Pdf-48px.png
  2. Theory of Frequency-Filtered and Time-Resolved $N$-Photon Correlations. E. del Valle, A. González-Tudela, F. P. Laussy, C. Tejedor and M. J. Hartmann in Phys. Rev. Lett. 109:183601 (2012). Pdf-48px.png
  3. Conventional and Unconventional Photon statistics. E. Zubizarreta Casalengua, J. C. López Carreño, F. P. Laussy and E. del Valle in Laser Photon. Rev. 14:1900279 (2020). Pdf-48px.png