Quantum interference with macroscopic objects

We demonstrate that an interference pattern is not only characteristic for a wave (packet) but that it can also be build up by many particles arriving one by one at a detector without direct information exchange between the particles. We also demonstrate that full which-path information does not necessarily rule out interference effects. We illustrate this by an interference circuit for people. Our results prove that it is possible to give a particle-only description of single-particle interference experiments without first solving a wave equation.