ELI5: Explain Like I'm 5

Majorana fermion

Okay, kiddo, so let me tell you about something called a Majorana fermion. A fermion is a type of particle that follows something called the Pauli exclusion principle, which means no two fermions can be in the same place at the same time.

Now, normally fermions come in pairs, with one particle having an opposite charge and spin to the other. But a Majorana fermion is a special type of fermion that is its own antiparticle. That's like having a twin who is actually just you but with different hair or clothes.

This means that if a Majorana fermion were to meet its antiparticle, they would just annihilate each other and disappear, without releasing any energy or particles. This makes them very interesting for scientists to study, especially in materials that can host Majorana fermions.

But don't worry if this all still sounds a little confusing, even to adults! The study of Majorana fermions is still an area of active research and there is a lot we still don't know about them. But it's exciting to imagine that there could be particles out there in the universe that have these unique properties.