Majoranafermionen
Majorana fermions are a type of elementary particle that are their own antiparticles. This concept was first proposed by Ettore Majorana in 1937. In quantum field theory, a fermion is typically described by a wavefunction. For most fermions, like electrons, their antiparticles (positrons) are distinct entities with opposite charge and other quantum numbers. However, a Majorana fermion's wavefunction is such that it is identical to its antiparticle. This means that a Majorana fermion and its antiparticle are the same particle.
The most well-known candidate for a Majorana fermion is the neutrino. While it was initially thought that
The existence of Majorana fermions is a topic of ongoing research in both theoretical and experimental physics.