【Date and Time】25-November-2025 14:00 (Beijing time)

【Venue】Room 526

【Host】Yue Chang (BAQIS)

【Title】 Generating and controlling quantum states of light with cavity and waveguide QED

【Speaker】 

I am a scientist specialized in the theoretical study of nanophotonic and AMO systems and their applications in quantum technologies. I defended my thesis in 2013 with the highest score at the Autonomous University of Madrid under the supervision of Prof. Carlos Tejedor de Paz. Later, I moved to the theory division of the Max Planck Institute for Quantum Optics under the supervision of Prof. Juan Ignacio Cirac. For this, I obtained the Alexander Von-Humboldt and Marie-Curie scholarships, which allowed me to work with my own funding and from the group until July 2018. In August 2018 I became a Senior Scientist in the QUINFOG group (http://quinfog.iff.csic.es) of quantum information. In 2021 I got an “Investigador Científico” position and was appointed Head of the Department of Quantum Physics in January 2022. Afterwards, in May 2024 I incorporated to a Full Professor position and lead the Quantum Nanophotonics research group within the Quantum Information and Foundations Group.

【Abstract】

The generation and control of quantum states of light is essential for the development of photonic quantum technologies. In this talk, I will first review how qualitatively new photon-mediated interactions emerge when emitters or resonators couple to chiral, multi-mode waveguides [1]. I will then show how these interactions enable the implementation of controlled photon-photon phase gates using only two-level systems [2] or "giant atom" molecules [3]. If time allows, I will also discussed how to optimize cavity QED dynamics to generate metrologically relevant states.

[1] C. Vega, A.M. Heras, D. Porras, A. González-Tudela, arXiv:2405.10176

[2] T. Levy-Yeyati, C. Vega, T. Ramos, A. Gonzále z-Tudela, PRX Quantum 6, 010342 (2025),

[3] T Levy-Yeyati, T Ramos, A González-Tudela, arXiv:2507.05377