A Novel Detector Called SQWARE Targets Axions
On July 5, researchers at Rice University in the United States unveiled a groundbreaking detector design named SQWARE, aimed at detecting axions—particles widely considered the leading candidates for dark matter. This theoretical model leverages semiconductor materials whose response shifts based on their alignment within a magnetic field. The detector’s architecture involves stacking ultra-thin semiconductor layers, known as multiple quantum wells.
Within these layers, electrons are confined to two-dimensional planes and behave like a plasma. This setup helps bridge the momentum gap between a heavy axion and a massless photon. Although the project remains theoretical for now, the team has already assessed how the device would perform under realistic lab conditions. They are now moving forward with building and testing initial prototypes.
“Bringing semiconductors from condensed matter physics into the mix is a completely new approach in the paleontology of elementary particles.”
Jaanita Mehrani, a graduate student in applied physics at Rice University
“Advances in semiconductors now allow us to tackle fundamental questions in cosmology.”
Xensi Huang, a colleague of Jaanita Mehrani
The SQWARE detector could mark a major step forward in understanding dark matter, which makes up most of the universe’s mass but remains invisible and elusive to conventional observation methods. If the prototypes prove successful, this new tool could provide scientists with fresh insights into axions, potentially reshaping our current understanding of the universe’s structure and evolution.