IFEG   20353
INSTITUTO DE FISICA ENRIQUE GAVIOLA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Controlled energy-selected electron capture and release in double quantum dots
Autor/es:
FEDERICO M. PONT; ANNIKA BANDE; LORENZ S. CEDERBAUM
Lugar:
Hamburg
Reunión:
Conferencia; 113. Bunsentagung; 2014
Resumen:
Highly accurate quantum electron dynamics calculations demonstrate that energy can be efficiently transferredbetween quantum dots. Specifically, in a double quantum dot an incoming electron is captured by one dot and theexcess energy is transferred to the neighboring dot and used to remove an electron from this dot. This process isdue to long-range electron correlation and shown to be operative at rather large distances between the dots. Theefficiency of the process is greatly enhanced by preparing the double quantum dot such that the incoming electronis initially captured by a two-electron resonance state of the system. In contrast to atoms and molecules in nature,double quantum dots can be manipulated to achieve this enhancement. This mechanism leads to a surprisinglynarrow distribution of the energy of the electron removed in the process which is explained by resonance theory.We argue that the process could be exploited in practice.