Probing thermoelectric transport with cold atoms

Autor:	Grenier, Charles, Kollath, Corinna, Georges, Antoine
Rok vydání:	2012
Předmět:	Condensed Matter - Quantum Gases Condensed Matter - Mesoscale and Nanoscale Physics Quantum Physics
Druh dokumentu:	Working Paper
Popis:	We propose experimental protocols to reveal thermoelectric and thermal effects in the transport properties of ultracold fermionic atoms, using the two-terminal setup recently realized at ETH. We show in particular that, for two reservoirs having equal particle numbers but different temperatures initially, the observation of a transient particle number imbalance during equilibration is a direct evidence of thermoelectric (off-diagonal) transport coefficients. This is a time-dependent analogue of the Seebeck effect, and a corresponding analogue of the Peltier effect can be proposed. We reveal that in addition to the thermoelectric coupling of the constriction a thermoelectric coupling also arises due to the finite dilatation coefficient of the reservoirs. We present a theoretical analysis of the protocols, and assess their feasibility by estimating the corresponding temperature and particle number imbalances in realistic current experimental conditions. Comment: 5 pages, 4 figures. Modified version, after some modifications
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1209.3942 Zobrazit plný text záznamu View this record from Arxiv