Statistics of radiation emitted from a quantum point contact

We analyze the statistics of the electromagnetic radiation emitted from electrons pushed through a quantum point contact. We consider a setup implemented in a two-dimensional (2D) electron gas where the radiation manifests itself in terms of 2D-plasmons/photons emitted from electrons scattered at the point contact. The bosonic statistics of the photons compete with the fermionic statistics of the electrons; as a result, the quantum point contact emits nonclassical radiation with a statistics which can be tuned from bunching to anti-bunching by changing the driving voltage. Our perturbative calculation of the irreducible two-photon probability correlator provides us with information on the statistical nature of the emitted photons and on the underlying electronic current flow.