IFEG   20353
INSTITUTO DE FISICA ENRIQUE GAVIOLA
Unidad Ejecutora - UE
artículos
Título:
Controlled energy-selected electron capture and release in double quantum dots
Autor/es:
FEDERICO M. PONT; ANNIKA BANDE; LORENZ S. CEDERBAUM
Revista:
PHYSICAL REVIEW B
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2013 vol. 88 p. 241304 - 241304
ISSN:
1098-0121
Resumen:
Highly accurate quantum electron dynamics calculations demonstrate that energy can be efficiently transferred
between quantum dots. Specifically, in a double quantum dot an incoming electron is captured by one dot and the
excess energy is transferred to the neighboring dot and used to remove an electron from this dot. This process is
due to long-range electron correlation and shown to be operative at rather large distances between the dots. The
efficiency of the process is greatly enhanced by preparing the double quantum dot such that the incoming electron
is 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 surprisingly
narrow 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.