BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Memento EPFL// BEGIN:VEVENT SUMMARY:Junior Quantum Seminar - Marco Scigliuzzo & Aleksei Gaier DTSTART:20251118T093000 DTEND:20251118T110000 DTSTAMP:20260916T053149Z UID:4723815fc4967fb7768da50922f3ec1ca2f40d69c37cd6cc8cfaa57e CATEGORIES:Conferences - Seminars DESCRIPTION:Marco Scigliuzzo and Aleksei Gaier\nPlease join us for the J unior Quantum Seminar with Marco Scigliuzzo from the Laboratory of Pho tonics and Quantum Measurements (LPQM)\, Institute of Physics\, EPFL who will give the talk "Quantum acoustics with superconducting circuits" and  Aleksei Gaier from the Laboratory of Hybrid Photonics\, EPFL who wil l give the talk "Bridging electronics and photonics with thin-film lithiu m niobate: electro-optic transduction from microwaves to terahertz" on Tu esday November 28th from 9h30-11h.\n\nPLEASE NOTE: The Junior Quantum Seri es are for gathering  the junior quantum community of master's student s\, PhDs and post-docs at EPFL\, to create a non-judgmental space were sci entific ideas can be shared between peers. This event is not for Professor s or senior researchers. \n\nABTRACT:\n1. Quantum acoustics with superco nducting circuits\n    What does it take to push a massive object into a genuinely quantum state and then control many such objects at once? Mec hanical oscillators offer a unique opportunity: their mass makes their qua ntum states sensitive to forces\, fields\, and even gravity\, but that sam e mass also makes them extremely hard to manipulate and scale. Quantum aco ustics tries to bridge this gap by using superconducting circuits to prepa re\, control\, and measure individual phonons in engineered mechanical dev ices.\nIn this talk\, I’ll discuss one of the central questions driving the field: how do we scale up mechanical quantum systems without losing qu antum coherence or control? I will present our progress toward building a platform with multiple independently addressable mechanical modes whose mo tion can be measured with quantum-limited sensitivity\, giving access to c orrelations and collective dynamics across distinct resonators. Collective effects\, such as collective sideband cooling and collective dissipative squeezing\, open the door to preparing and manipulating multiple mechanica l modes in quantum states.\nI will also show our efforts to create delocal ized phonon-photon hybrid excitations by coupling chains of high overtone bulk acoustic resonators to superconducting circuits\, an acoustic analogu e of defects in a crystal band structure. Such excitations offer a promisi ng route toward distributed quantum sensing and mechanically mediated quan tum networks.\nThese developments outline a concrete path toward scalable quantum acoustics and toward using mechanical degrees of freedom as a reso urce in larger quantum technologies.\n\n2. Bridging electronics and photo nics with thin-film lithium niobate: electro-optic transduction from micro waves to terahertz\n    Advances in thin-film lithium niobate (TFLN) t echnology are redefining the interface between high-frequency electronics and integrated photonics. In this talk\, I will present our recent progres s on electro-optic transduction in TFLN devices operating beyond 100 GHz\, highlighting how photonic circuits can efficiently detect and manipulate electromagnetic signals well into the terahertz regime. By leveraging low- loss optical resonators with terahertz cavities formed by metallic electro des and on-chip antennas\, we demonstrate high-efficiency conversion of te rahertz fields into the optical domain.\nBeyond transduction\, I will disc uss our approach to characterizing incoherent terahertz radiation through optical correlation measurements\, enabling new insight into the temporal and spectral statistics of broadband terahertz sources. I will present our initial results on this technique\, demonstrating its ability to characte rize continuous-wave terahertz sources.\n\nBIO:\nMarco Scigliuzzo is a pos tdoctoral researcher and QSE Fellow at the Laboratory of Photonics and Qua ntum Measurements (LPQM) at EPFL. His research focuses on hybrid quantum s ystems based on superconducting circuits and mechanical resonators\, with an emphasis on microwave-phonon interactions and engineered circuit and wa veguide QED\, including qubits coherence and traveling-wave parametric amp lification. He obtained his Master’s degree in Physics from the Universi ty of Salento and his PhD from Chalmers University of Technology\, where h e worked on superconducting qubits and quantum electromechanical systems.\ n\nAleksei Gaier has completed his bachelor's and master's degrees at Lomo nosov Moscow State University\, where he worked in biophotonics\, developi ng optical methods based on time-resolved fluorescence measurements to stu dy the properties of blood serum. He started his PhD in November 2022\, wo rking on the thin-film lithium niobate integrated devices for applications in terahertz science.\n  LOCATION:CE 1 100 https://plan.epfl.ch/?room==CE%201%20100 STATUS:CONFIRMED END:VEVENT END:VCALENDAR