Shot Noise and Full Counting Statistics from Non-equilibrium Plasmons in a Double Junction Quantum Wire

We consider a quantum wire double junction system with each wire segment described by a spinless Luttinger model, and study theoretically shot noise and full counting statistics. We find that the non-equilibrium plasmonic excitations in the central wire segment give rise to qualitatively different behavior compared to the case with equilibrium plasmons. In particular, shot noise is greatly enhanced by non-equilibrium plasmons, and exceeds the Poisson limit.