Decoherence processes during optical manipulation of excitonic qubits in semiconductor quantum dots

2004/04/20 by Q. Q. Wang, Andreas Müller, A. Muller +12 · 1 citation
Computer Science · Physics and Astronomy · #Quantum Information and Cryptography #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat.other

paper · pdf · doi:10.1103/physrevb.72.035306

18 pages, 4 figures

arxiv created 2004/04/20 · openalex publication_date 2005/07/06 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Using photoluminescence spectroscopy, we have investigated the nature of Rabi oscillation damping during optical manipulation of excitonic qubits in self-assembled quantum dots. Rabi oscillations were recorded by varying the pulse amplitude for fixed pulse durations between 4\phantom\rule0.3em0exps and 10\phantom\rule0.3em0exps. Up to five periods are visible, making it possible to quantify the excitation dependent damping. We find that this damping is more pronounced for shorter pulse widths and show that its origin is the nonresonant excitation of carriers in the wetting layer, most likely involving bound-to-continuum and continuum-to-bound transitions.

Citations

• Phonon-Assisted Damping of Rabi Oscillations in Semiconductor Quantum Dots
• Experimental realization of the one qubit Deutsch-Jozsa algorithm in a quantum dot
• Determination of anisotropic dipole moments in self-assembled quantum dots using Rabi oscillations

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• Two-qubit conditional quantum-logic operation in a single self-assembled quantum dot