Energy and power fluctuations in ac-driven coherent conductors

BATTISTA FRANCESCA; FEDERICA HAUPT; JANINE SPLETTSTOESSER

PHYSICAL REVIEW B - SOLID STATE

APS

Año: 2014 vol. 90

0556-2805

Using a scattering matrix approach we study transport in coherent conductors driven by a timeperiodicbias voltage. We investigate the role of electron-like and hole-like excitations created bythe driving in the energy current noise and we reconcile previous studies on charge current noise inthis kind of systems. The energy noise reveals additional features due to electron-hole correlations.These features should be observable in power fluctuations. In particular, we show results for thecase of a harmonic and bi-harmonic driving and of Lorentzian pulses applied to a two-terminalconductor, addressing the recent experiments of Refs. 1 and 2.