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Electronic transient processes and optical spectra in quantum dots for quantum computing

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3 Author(s)
Kral, K. ; Inst. of Phys., Acad. of Sci. of the Czech Republic, Praha, Czech Republic ; Zdenek, P. ; Khas, Z.

Quantum dot systems are studied theoretically from the point of view of realization of quantum bit using the orbital state of electronic motion in a quantum dot. Attention is paid to several effects which can influence significantly the application of quantum dot electronic orbital states in quantum computing, for example, the effect of upconversion of the population and the incomplete depopulation of electronic orbital states, the effect of optical line broadening and presence of continuous background in optical spectra. Attention is also paid to the effect of upconversion of electronic population to the wetting-layer or above-barrier electronic states in quantum dot samples. Interaction of electrons with the longitudinal optical phonons is shown to play a significant role in these effects. Possible impact of these phenomena on the realization of quantum bit based on electronic orbital states in quantum dots is discussed.

Published in:

Nanotechnology, IEEE Transactions on  (Volume:3 ,  Issue: 1 )

Date of Publication:

March 2004

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