Custom 'headphones' boost atomic radio reception 100-fold

https://phys.org/news/2022-05-custom-headphones-boost-atomic-radio.html

"loop captures the incoming magnetic field, creating a voltage across the gaps... large electromagnetic field is developed across the gap... loop and gap sizes determine the natural, or resonant, frequency of copper structure... gap over 10 mm, limited by outside diameter available vapor cell... commercial mathematical simulator determine loop size needed... resonant frequency near 1.312 gigahertz... Rydberg atoms switch between energy levels... signal could be 130 times stronger... measured result hundredfold"