NCTS (South)


DATE2013-02-25

TIME12:00

PLACER49223, Second Physics Building , NCKU

FIELDQuantum Information Science

SPEAKER Dr. SUNG PO CHAO(趙松柏) - 清華大學國家理論科學研究中心

TITLEEdge state transport of 2D Topological insulator through a quantum dot

ABSTRACTWe study a non-equilibrium transport through a quantum dot coupled to two fermionic leads made of interacting helical edge state electrons of 2D topological insulators.Via the Keldysh perturbation theory, we obtain the exact non-equilibrium current and conductance for non-interacting dot. For weakly interacting dot the equation of motion approach is used to obtain approximate non-equilibrium current. We find in both cases the conductance sensitively depend on thenteraction strengths in the leads. Relevance of our results in experiments is discussed.