QFS2016 Book of Abstracts

Abstracts

P1.10 Manifestation of Fermi edge singularity in co-tunnelling regime Artem Borin, Eugene Sukhorukov University of Geneva, Theoretical Physics Department, 24 quai Ernest-Ansermet, 1211 Geneva 4, Switzerland The Fermi edge singularity (FES) is a prominent manifestation of the Coulomb interaction. It could be observed in a controllable way by studying the transport through the quantum dot (QD), which is electrostatically coupled to the leads. In this paper we study how FES affects higher-order tunnelling processes (co-tunnelling). To study this problem we use the bosonic description of fermions, which naturally incorporates the Coulomb interaction. We report multifractional dependense of the current through QD on the energy of the level on QD and on the bias between the leads. The universal powers are determined by the scattering phases due to interaction with charge on the QD. P1.11 The 3 He NMR as a probe for geological research Alakshin Egor(1), Gazizulin Rasul(1), Klochkov Alex(1), Safiullin Kajum(1), Tagirov Murat(1,2) 1) Kazan Federal University, Institute of Physics, 420008, Kremlevskaya 18 Kazan, Russia 2) Institute of Perspective Research, TAS, 420111, L. Bulachnaya 36a Kazan, Russia There are various methods for studying geological samples, but for some of them traditional methods are not very suitable or not reliable. For instance, the integral porosity measurements for substrates with low porosity or so-called closed porous substrates demand new methods to be implemented. The 3 He NMR at temperatures in the range of 1.5K – 4.2K is developing method for such application. The NMR data of 3 He in pores of several model samples and geological specimens is reported, the models of nuclear magnetic relaxation is proposed and the value of integral porosity estimated. The inverse Laplace transform of the 3 He longitudinal magnetization recovery curve has been carried out and the distribution of the relaxation times T1 has been obtained.

27