RQC Seminar

198th RQC Seminar

• Speaker

  Mr. Andrea Zappalà
  ( University of Messina, Italy )

• Date

  16:00-17:00 (4:00 p.m. - 5:00 p.m.), May 23, 2025 (Friday)

• Venue

  Hybrid(ZOOM・ Wako Main Research 3F 345-347 Seminar Room / 研究本館3階 セミナー室 (345-347) (C01))

• Title

  From Few to Many Emitters Cavity QED : Energy Levels and Emissions Spectra from Weak to Deep-Strong Coupling

• Inquiries

  norilab_rqc_assist[at]ml.riken.jp

Abstract
I present a systematic study of the emission properties under incoherent excitation of systems composed by N two-level non-interacting quantum emitters coupled to a single cavity mode. We adopt a general theoretical framework for open cavity QED systems which is valid for any light-matter interaction regime and ensures gauge invariance for truncated Hilbert spaces. We have investigated the emission spectra under incoherent excitation of the two-level atoms, considering coupling strengths ranging from the weak coupling to the ultrastrong and deep-strong coupling regimes. We also studied the impact on the spectra of considering a collective reservoir, individual reservoirs, or their coexistence for the ensemble of emitters. These results also clarify how the system evolves towards a system of two single mode interacting bosonic fields with the increasing of the number N of emitters.