Detection of single-electron heat transfer statistics
1 Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC) - Cantoblanco 28049 Madrid, Spain, EU
2 Département de Physique Théorique, Université de Genève - CH-1211 Genève 4, Switzerland
Received: 11 July 2012
Accepted: 12 November 2012
We consider a quantum dot system whose charge fluctuations are monitored by a quantum point contact allowing for the detection of both charge and transferred heat statistics. Our system consists of two nearby conductors that exchange energy via Coulomb interaction. In interfaces consisting of capacitively coupled quantum dots, energy transfer is discrete and can be measured by charge counting statistics. We investigate gate-dependent deviations away from a charge fluctuation theorem in the presence of local temperature gradients (hot spots). Non-universal relations are found for state-dependent charge counting. A fluctuation theorem holds for coupled dot configurations with heat exchange and no net particle flow.
PACS: 73.23.−b – / 72.70.+m – / 73.50.Lw –
© EPLA, 2012