Title: Experimental Quantum Electrodynamics
Abstract: Traditional approaches to quantum optics are rooted in the reciprocal, frequency-momentum space. In this talk, I will discuss recent advances toward sub-cycle quantum optics, where, instead, quantum fields are accessed in a localized region of space-time. Both regimes will be compared side-by-side to contrast the advantages of each approach, with a particular emphasis on quantum sensing proposals [1-3] in the mid-infrared frequency range.
In the concluding part of the talk, I will summarize recent advances in producing few-cycle bright one- and two-mode squeezed vacuum states approaching macroscopic photon numbers . Such capabilities are poised to unlock a new era of (extreme) nonlinear quantum optics in the attosecond regime .
 Enhanced electro-optic sampling with quantum probes Stéphane Virally, Patrick Cusson, DVS, Phys. Rev. Lett. 127, 270504 (2021)
 Self-referenced subcycle metrology of quantum fields S. Gündoğdu, S. Virally, M. Scaglia, DVS, A.S. Moskalenko, Laser Phot. Rev. 17, 2200706 (2023)
 Direct measurement of Husimi-Q function of electric field in time-domain
Sho Onoe, Stéphane Virally, DVS, arXiv:2307.13088 (2023)
 Twin beam probe pulses for subcycle sampling of mid-IR quantum fields Patrick Cusson; Stéphane Virally; DVS, IRMMW-THz Conference, paper Th-PM2-5-7 (2023)
 2023 Nobel Prize in Physics: Pierre Agostini, Ferenc Krausz and Anne L'Huillier. Experimental methods that generate attosecond pulses for studying electron dynamics in matter.
About the speaker: Denis Seletskiy is an Associate Professor of Engineering Physics and a holder of Canada Research Chair (Tier 2) in "Ultrafast and Quantum Photonics" at Polytechnique Montréal (Canada). He received his PhD from the Optical Sciences and Engineering program at the University of New Mexico in 2010 under the supervision of Professor Mansoor Sheik-Bahae, followed by a National Research Council postdoctoral fellowship at Air Force Research Laboratories (2010-2012) and a 5-year junior group leader position and Marie Curie Zukuntskolleg Research fellowship at the University of Konstanz, Germany. In 2017 Seletskiy established the femtoQ laboratory at Polytechnique, which is focused on advancing theory, laser technology, and metrology protocols for time-domain quantum photonics. Since October 2022, he is leading an EU-CAN consortium in Mid-Infrared Quantum Technologies for Sensing (MIRAQLS).