![]() But what happens when we couple the particles strongly? To reveal the interesting collective phenomena that can result, we’ve had to rely largely on experiments. We understand the behavior of free particles and can sometimes use perturbation theory to incorporate weak interactions between them. Humans are not very good at understanding interacting many-body systems. This deceptively simple statement joins together several disparate lines of progress in theoretical physics: interacting topological insulators, anomalies in quantum field theory, spin liquids, and compressible quantum Hall states. ![]() A trio of papers now shows that these particles can also be found in a dual description of quantum electrodynamics (QED). ×ĭirac fermions in 2+1 dimensions (two spatial dimensions plus time) have been found in graphene and on the surfaces of topological insulators (TIs). APS/ Alan Stonebraker Figure 1: The action of discrete symmetries on the fermionic particle (top) and its dual fermionic vortex (bottom).
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |