A Mechanism to Attract Electrons

In a startling discovery it has been recently found that certain density of states (DOS) can become negative in mesoscopic systems wherein electrons can travel back in time. We give a brief introduction to the hierarchy of density of states in mesoscopic systems as we want to point out some robust phenomenon that can be experimentally observed with our present day technologies. They can have direct consequences on thermodynamic effects and also can provide indirect evidence of time travel. Essentially certain members of the hierarchy of DOS become negative in these regimes and that can attract other electrons.