Berlin 2015 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
TT: Fachverband Tiefe Temperaturen
TT 89: Transport: Quantum Dots, Quantum Wires, Point Contacts 1 (jointly with HL)
TT 89.1: Talk
Thursday, March 19, 2015, 11:00–11:15, A 053
Interference of real and virtual transitions in quantum dot chains — •Fernando Gallego-Marcos, Rafael Sánchez, and Gloria Platero — Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Spain
We analyzed long-range transport through an ac driven triple quantum dot. Resonant transitions between separated and detuned dots are mediated by the exchange of n photons with the time-dependent field. An effective model is proposed in terms of higher-order transitions which involve the virtual only occupation of the intermediate dot [1]. The ac driving modulates the tunneling processes within the quantum dot system [2]. We investigate the interplay between real transitions through the centre dot and virtual long-range tunneling. We find configurations where the two paths interfere destructively and totally block the current. The effect of the driving phase will be emphasized.
[1] R. Sánchez, F. Gallego-Marcos, G. Platero,
Phys. Rev. B 89, 161402 (2014)
[2] F. Gallego-Marcos, R. Sánchez, G. Platero, arXiv:1408.4923