Quantum-Information Processing with Semiconductor Macroatoms

Abstract

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.

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

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Cited by in corpus (119)

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• Optical Schemes for Quantum Computation in Quantum Dot Molecules
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• Multipartite entangled states in coupled quantum dots and cavity-QED
• Recent advances in exciton based quantum information processing in quantum dot nanostructures
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• Quantum-transport theory for semiconductor nanostructures: A density-matrix formulation
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• Holonomic quantum gates: A semiconductor-based implementation
• Theory of Fast Quantum Control of Exciton Dynamics in Semiconductor Quantum Dots
• Reducing decoherence of the confined exciton state in a quantum dot by pulse-sequence control
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• Optimal quantum control in nanostructures: Theory and application to generic three-level system
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• Generation of maximum spin entanglement induced by cavity field in quantum-dot systems
• Spin-based quantum information processing with semiconductor quantum dots and cavity QED
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• Quantum computation with coupled-quantum-dots embedded in optical microcavities
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• Realization of symmetric sharing of entanglement in semiconductor microcrystallites coupled by a cavity field
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