RQC Seminar

99th RQC Seminar

• Speaker

  Dr. Edwin Ng
  ( PHI Research Lab. NTT, US )

• Date

  16：00-17：00, December 4, 2023 (Monday)

• Venue

  Hybrid(ZOOM・ Wako Main Research 3F 345-347 Seminar Room C01）

• Title

  Navigating the classical-to-quantum transition in ultrafast nonlinear nanophotonics

• Inquiries

  rqc_info[at]ml.riken.jp

Abstract
Recent technological advances in nonlinear nanophotonic platforms like thin-film lithium niobate have brought the operation of nonlinear-optical devices tantalizingly close to the few-photon regime. In this talk, I survey some interesting quantum phenomena that could emerge in such devices within the near future, as operational energy scales move from the classical regime of millions of photons or more to the mesoscopic regime of dozens to hundreds. First, I describe a general framework for modeling the nonlinear dynamics of broadband Gaussian quantum noise and entanglement in femtosecond pulses, with examples from supercontinuum generation and saturated parametric generation [1]. Building on this semiclassical framework, we then examine pump depletion in squeezed light generation as a useful case study in understanding how non-Gaussian physics naturally emerge in ultrafast pulse propagation [2]. The study of such mesoscopic physics has the potential to stimulate new research directions in all-optical information processing, sensing, and computation.
[1] E. Ng, R. Yanagimoto et al, arXiv:2307.05464 [quant-ph].
[2] R. Yanagimoto, E. Ng et al, Optica 9, 379 (2022).