"Experimental techniques for exploring the BEC-BCS crossover"

The BEC-BCS crossover in ultracold Fermi gases offers a unique platform for exploring strongly correlated quantum systems in a highly controlled environment. In my lecture, I will provide a comprehensive overview of the experimental techniques used to realize and probe this crossover. The session will focus on the experimental platform required to study fermionic pairing. Topics will include the cooling and trapping of fermionic atoms, the control of interatomic interactions using Feshbach resonances to explore the crossover, and common detection techniques such as Bragg spectroscopy for investigating pairing mechanisms. The second session will delve into the fascinating world of dipolar gases, focusing on how long-range interactions reshape the nature of fermionic pairing. We will explore both theoretical and experimental perspectives on the emergence of novel pairing mechanisms and many-body states in systems with anisotropic interactions.

This workshop is intended for Master’s and PhD students with a strong interest in ultracold fermionic systems. Emphasis will be placed on developing experimental intuition and understanding current challenges and opportunities in the field.

Bio:

Dr. César R. Cabrera is a Junior Group Leader at the University of Hamburg (Germany), working in the Quantum Matter group led by Prof. Henning Moritz. He holds a degree in Physics from the Universidad Autónoma de San Luis Potosí and a Master’s in Science from the University of Bonn (Germany). Supported by a CONACYT scholarship, he completed his PhD at ICFO (Barcelona), where he achieved the first Bose–Einstein condensate in Spain and the first observation of an ultra-dilute quantum droplet stabilized by quantum fluctuations. He later joined the Max Planck Institute of Quantum Optics in Munich for his postdoctoral research, working in the group of Professors Immanuel Bloch and Monika Aidelsburger.

Since 2022, he has been working in Hamburg, leading projects on Fermi gases in low dimensions and coordinating the Graduate School of the Cluster of Excellence CUI: Advanced Imaging of Matter. He recently established his own research group after being awarded the prestigious ERC Starting Grant. In his new project, he will investigate the quantum simulation of strongly correlated systems with long-range interactions using ultracold dipolar atoms.