FisMat2017 - Submission - View

Abstract's title: Time resolved energy transfer in ac driven quantum dots: How to probe the energy reactance
Submitting author: Maria Florencia Ludovico
Affiliation: International Center for Advanced Studies (ICAS), Universidad de San Martin
Affiliation Address: ICAS Campus Miguelete, 25 de Mayo y Francia. C.P.: 1650. San Martín, Provincia de Buenos Aires, Argentina
Country: Argentina
Oral presentation/Poster (Author's request): Poster
Other authors and affiliations: 1)Liliana Arrachea. Affiliation: International Center for Advanced Studies, UNSAM, Campus Miguelete, 25 de Mayo y Francia, 1650 Buenos Aires, Argentina. 2)Michael Moskalets. Affiliation: Department of Metal and Semiconductor Physics, NTU "Kharkiv Polytechnic Institute", 61002 Kharkiv, Ukraine 3)David Sanchez. Affiliation: Instituto de Fisica Interdisciplinar y Sistemas Complejos IFISC (UIB-CSIC), E-07122 Palma de Mallorca, Spain

Nanoscale quantum devices are characterized by small (nanoscale) components confining a few number of particles, which are in contact to macroscopic reservoirs. This puts the description of the energy transport and heat generation beyond the scope of usual thermodynamical approaches.
At the heart of this problem, there is the proper definition of the quantum heat current in the time domain. In particular due to the energy temporarily stored at the contact region (energy reactance) between a nano-system and macroscopic reservoirs, which manifests itself in a time-dependent setup only.
We propose that an appealing scenario to address this problem from the theoretical point of view is a periodically driven single level in contact to an electron reservoir.
We argue that it is physically meaningful to take the energy reactance into account as a contribution to the time-dependent heat current flowing into the reservoir, and we show that this is in full agreement with the laws of thermodynamics. Moreover, we propose a measurement scheme that is able to test the effect of the energy reactance onto a time-dependent heat flux, which consist in a floating probe electrically and thermally isolated from the environment but weakly coupled to the quantum dot.