Seminario del Departamento de Física Teórica: “Quantum Technology Searches for Ultralight Axions”.- Viernes 30 de mayo
Este viernes 30 de mayo de 2025 tendrá lugar el seminario de título "Quantum Technology Searches for Ultralight Axions", impartido por Sreemanti Chakraborti (Durham University, England) y organizado por el Departamento de Física Teórica. Se celebrará en el Seminario de Física Nuclear, en el edificio A, a las 12:00 h.
Resumen (en inglés):
In this talk, I will discuss axion-like particles (ALPs) as dark matter candidates in the ultralight mass regime. Starting from the ALP Lagrangian at the UV scale, a consistent quantum field theory treatment is required to derive the relevant low-energy interactions. A wide range of quantum sensor experiments have been proposed to search for such particles, particularly those probing large values of the axion decay constant where running effects become significant. While linear ALP couplings are constrained by their pseudoscalar nature, quadratic interactions are indistinguishable from those of a scalar. As a result, the two types of couplings are probed by distinct experimental strategies. I will present the reach of various quantum sensor platforms, including atomic clocks, optical and atom interferometers, and microwave cavity haloscopes. Finally, I will comment on the nonlinear behaviour of the ALP field near the Earth’s surface and identify the classes of experiments that could be impacted by this feature.
