We propose a scheme for controlling the coherent transport of a single electron through a closed three-level structure in coupled quantum dots.The coherent transport is externally controlled by applying a weak few-cyc...We propose a scheme for controlling the coherent transport of a single electron through a closed three-level structure in coupled quantum dots.The coherent transport is externally controlled by applying a weak few-cycle pulse with an adjustable carrier-envelope phase(CEP).It is revealed numerically that there exists a significant dependence of the electron transport on the CEP.Our results illustrate the potential to utilize few-cycle pulses for the excitation in coupled quantum dot systems through control of the CEP,as well providing guidance in the design for possible experimental implementations.展开更多
We theoretically study the coherent transport of a single electron between the ground states of a double coupled quantum dot structure. The coherent transport is externally controlled by applying a few-cycle pulse wit...We theoretically study the coherent transport of a single electron between the ground states of a double coupled quantum dot structure. The coherent transport is externally controlled by applying a few-cycle pulse with an adjustable carrier-envelope phase(CEP). By simulating numerically, it is shown that there exhibits a strong dependence of electron transport on the CEP and on the arrival time of few-cycle pulse. We provide a simple analytical description for this phenomenon by approximating the quantum dot structure as a three-level Λ-type system. These results also illustrate the potential of utilizing excitation in coupled quantum dots as a means of measuring the CEP of few-cycle pulses.展开更多
基金Supported in part by the National Natural Science Foundation of China under Grant Nos 11074036 and 11374050the Qing Lan project of Jiangsu Province.
文摘We propose a scheme for controlling the coherent transport of a single electron through a closed three-level structure in coupled quantum dots.The coherent transport is externally controlled by applying a weak few-cycle pulse with an adjustable carrier-envelope phase(CEP).It is revealed numerically that there exists a significant dependence of the electron transport on the CEP.Our results illustrate the potential to utilize few-cycle pulses for the excitation in coupled quantum dot systems through control of the CEP,as well providing guidance in the design for possible experimental implementations.
基金Supported in part by National Natural Science Foundation of China under Grant Nos.11374050 and 61372102Qing Lan Project of Jiangsu,and the Fundamental Research Funds for the Central Universities under Grant No.2242012R30011
文摘We theoretically study the coherent transport of a single electron between the ground states of a double coupled quantum dot structure. The coherent transport is externally controlled by applying a few-cycle pulse with an adjustable carrier-envelope phase(CEP). By simulating numerically, it is shown that there exhibits a strong dependence of electron transport on the CEP and on the arrival time of few-cycle pulse. We provide a simple analytical description for this phenomenon by approximating the quantum dot structure as a three-level Λ-type system. These results also illustrate the potential of utilizing excitation in coupled quantum dots as a means of measuring the CEP of few-cycle pulses.
