Quantum-Information Processing with Semiconductor Macroatoms

Details Quantum-Information Processing with Semiconductor Macroatoms Quantum-Information Processing with Semiconductor Macroatoms

2000-07-12

arxiv.org/abs/quant-ph/0007034v2

Phys. Rev. Lett. 85, 5647 (2000)

Physics

Quantum Physics

11 pages, 5 figures, to be published in Phys. Rev. Lett., significant changes in the text and new simulations (figure 3)

Scientific paper

10.1103/PhysRevLett.85.5647

An all optical implementation of quantum information processing with semiconductor macroatoms is proposed. Our quantum hardware consists of an array of semiconductor quantum dots and the computational degrees of freedom are energy-selected interband optical transitions. The proposed quantum-computing strategy exploits exciton-exciton interactions driven by ultrafast sequences of multi-color laser pulses. Contrary to existing proposals based on charge excitations, the present all-optical implementation does not require the application of time-dependent electric fields, thus allowing for a sub-picosecond, i.e. decoherence-free, operation time-scale in realistic state-of-the-art semiconductor nanostructures.

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