A research team from the Faculty of Physics and the Centre for Quantum Optical Technologies at the Centre of New Technologies, University of Warsaw has introduced a new way to measure hard-to-detect terahertz signals using a "quantum antenna." In their work, the scientists applied an innovative radio wave detection setup based on Rydberg atoms that not only senses terahertz radiation, but also accurately calibrates a so-called frequency comb in this part of the spectrum. Until recently, the tera...