| Semiconductor quantum dots because of their low lying discrete states are very often depicted as macro - atoms and envisioned as good candidates for implementing « in real life » quantum computations. This rosy description is however far from the truth. I will show that the solid state environement (consubstantial to the semiconductors) provide very powerful decoherence channels for the electron states. This will include phonons (both acoustical and optical) and randomly occupied traps that surround the quantum dots. Both interband and intraband transitions will be used for illustrations. |
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