山西大学学报（自然科学版）2012，Vol.35Issue(1)：56-62,7.
串联强耦合双量子点的电子全计数统计研究
Full Counting Statistics of Electron Transport Through Two Coherent Strongly Coupled Quantum Dots
摘要
Abstract
The full counting statistics of electron transport through two coherent strongly coupled quantum dots is studied based on an efficient particle-number-resolved master equation. The negative differential conductance is observed for appropriate values of level detuning when the coupling of the quantum dots system with the incident-electrode is stronger than that with the outgoing-electrode .and the on-site energy of the left quantum dot coupled to incident-electrode is larger than that of the right quantum dot coupled to out-electrode,I. E. ,εL>εR, which is accompanied by a super-Poissonian noise but that occurs in a small bias voltage range; whereas for the εl<εr case the super-Poissonian noise can appear in a relatively large bias voltage range,and can still occur in the case of an large detuning of level energies,which is contrary to the εl>εr case. The super-Poissonian noise characteristics can be qualitatively attributed to the effective competition between fast and slow transport channels.关键词
量子点/全计数统计/超泊松噪声Key words
quantum dot/full counting statistics/super-Poissonian noise分类
数理科学引用本文复制引用
张宏伟,薛海斌..串联强耦合双量子点的电子全计数统计研究[J].山西大学学报（自然科学版）,2012,35(1):56-62,7.基金项目
山西省自然科学基金(20090110011) （20090110011）
国家自然科学基金(10774094) （10774094）
