Dynamical Transport Property through an Interacting Quantum Wire
CHENG Fang1, ZHOU Guang-Hui1,2
1Department of Physics, Hu’nan Normal University, Changsha 410081
2International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110015
Dynamical Transport Property through an Interacting Quantum Wire
CHENG Fang1;ZHOU Guang-Hui1,2
1Department of Physics, Hu’nan Normal University, Changsha 410081
2International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110015
Abstract： Using the equation of motion, we investigate theoretically the dynamical ac conductance of a clean Luttinger-liquid quantum wire adiabatically coupled to Fermi liquid electron reservoirs in the presence of short-ranged electron-electron interactions. For a perfect single mode quantum wire, in the limit of zero-ranged interaction we conclude that the static dc conductance of ω→0 is e2/h, which is independent of the electron interactions. While in the dynamical case of ω≠0, the ac conductance oscillates with the amplitude e2/h and the period which depends on the interaction strength and the driving frequency as well as the position in the wire.
2005, Vol. 22 
