Quantum heat fluctuations of single particle sources

TL;DR

This paper theoretically investigates heat current noise in quantum single-electron sources, revealing how energy fluctuations relate to wavefunction properties and exhibit non-classical features.

Contribution

It introduces a theoretical framework linking heat fluctuations to single-particle wavefunctions in quantum electron sources, highlighting non-classical effects.

Findings

Heat current noise arises from energy fluctuations of emitted particles.

Temperature and potential fluctuations reveal wavefunction characteristics.

Strong non-classical features are observed in the fluctuation distributions.

Abstract

Optimal single electron sources emit regular streams of particles, displaying no low frequency charge current noise. Due to the wavepacket nature of the emitted particles, the energy is however fluctuating, giving rise to heat current noise. We investigate theoretically this quantum source of heat noise for an emitter coupled to an electronic probe in the hot-electron regime. The distribution of temperature and potential fluctuations induced in the probe is shown to provide direct information on the single particle wavefunction properties and display strong non-classical features.