RQC Seminar

47th RQC Seminar

• Speaker

  Ms. Therese Karmstrand
  ( Chalmers University of Technology, Sweden )

• Date

  16:00 - 17:00 (JST), May 19, 2023 (Friday)

• Venue

  Hybrid(ZOOM・ Wako HQ 2F L Conference Room)

• Title

  From unconventional saturation to optical bistability: exploring the Tavis–Cummings model with a highly dissipative cavity

• Inquiries

  rqc_info[at]ml.riken.jp

Abstract
Recent technological advancements have enabled strong light-matter interactions in highly dissipative cavity-emitter systems, which can be well described by the driven-dissipative Tavis–Cummings model. By avoiding the commonly applied adiabatic elimination of the lossy mode, we identified an intriguing correlation between the response of the cavity field to external driving and the emitter number N, which is a signature of the effect we call unconventional saturation [1]. Specifically, we found that (N+1)-photon absorption dominates this regime's cavity response, giving a power-of-2(N+1) dependence on the external drive strength. Thus, the effect shows potential for applications in emitter-number characterization and photon-state engineering. Moreover, it reveals an intriguing precursor to the critical behaviour known as absorptive optical bistability, studied in Tavis-Cummings type systems in the 70s and 80s [2,3,4].


[1] T. Karmstrand et al., arXiv:2110.00595 (2021)
[2] R. Bonifacio and L. A. Lugiato, Physical Review A 18, 1129 (1978)
[3] C. Savage and H. Carmichael, IEEE Journal of Quantum Electronics 24, 1495 (1988)
[4] S. Sarkar and J. S. Satchell, Europhysics Letters (EPL) 3, 797 (1987)