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Article overview
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Optimal Laser-Control of Double Quantum Dots | E. Rasanen
; A. Castro
; J. Werschnik
; A. Rubio
; E. K. U. Gross
; | Date: |
2 Jul 2007 | Abstract: | The realization of coherent quantum control of a single electron in a double
quantum dot is studied theoretically. Using optimal-control theory it is shown
that when an uncontrollable harmonic quantum dot is split into two coupled
dots, a fraction of the single-electron states become completely controllable
by linearly polarized laser pulses. In double dots of realistic sizes,
few-picosecond optimal pulses are sufficient to generate transitions at high
occupations (>0.99). This opens up possibilities in coherent manipulation of
the electron localization in the double dot by refined terahertz
quantum-cascade lasers. In contrast with the use of recently suggested
sinusoidal waves, the electron transport driven by optimized laser pulses is
not sensitive to the interdot distance, nor to the possible anharmonicity of
the potential. | Source: | arXiv, arxiv.0707.0179 | Services: | Forum | Review | PDF | Favorites |
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