Counting statistics in multiple path geometries and the fluctuations of the integrated current in a quantum stirring device Academic Article uri icon


  • Abstract The amount Q of particles that are transported via a path of motion is characterized by its expectation value lang Q rang and by its variance Var (Q). We analyze what happens if a particle has two optional paths available to get from one site to another site, and in particular what is Var (Q) for the current which is induced in a quantum stirring device. It turns out that coherent splitting and the stirring effect are intimately related and cannot be understood within the framework of the prevailing probabilistic theory.

publication date

  • January 1, 2008