##
Quantum heat fluctuations of single particle sources

### Francesca Battista

Mathematical Physics

**Wednesday, 19 December 2012, 11:00**

Matfys library

**Abstract**:

Optimal single electron pumps emit regular streams of particles,
displaying no charge current noise. Due to the wavepacket nature of
the pumped particles, the emitted energy is however fluctuating,
giving rise to heat current noise. We investigate theoretically these
quantum heat fluctuations, considering single particle sources
implemented with edge states in the quantum Hall regime. The heat
fluctuations are detected via experimentally accessible potential
fluctuations in a terminal in the hot-electron regime, coupled to the
source. Investigating the full statistical distribution of potential
fluctuations, we find that 2n:th order correlations of the potential
fluctuations provide direct information about the n:th moment of the
heat fluctuations of the source.