Reducing decoherence of the confined exciton state in a quantum dot by pulse-sequence control

Abstract

We study the phonon-induced dephasing of the exciton state in a quantum dot excited by a sequence of ultra-short pulses. We show that the multiple-pulse control leads to a considerable improvement of the coherence of the optically excited state. For a fixed control time window, the optimized pulsed control often leads to a higher degree of coherence than the control by a smooth single Gaussian pulse. The reduction of dephasing is considerable already for 2-3 pulses.

Final version (moderate changes)

References in corpus (3)

• Resonant nature of phonon-induced damping of Rabi oscillations in quantum dots
• Optimal strategy for a single-qubit gate and trade-off between opposite types of decoherence
• Damping of Rabi oscillations in quantum dots due to lattice dynamics

Cited by in corpus (7)

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• The role of phonons for exciton and biexciton generation in an optically driven quantum dot
• Effect of detuning on the phonon induced dephasing of optically driven InGaAs/GaAs quantum dots
• Interplay and optimization of decoherence mechanisms in the optical control of spin quantum bits implemented on a semiconductor quantum dot
• Controlling Photoluminescence Spectra of hBN Color Centers by Selective Phonon-Assisted Excitation: A Theoretical Proposal
• Polarization dependence of phonon influences in exciton-biexciton quantum dot systems
• Indirect spin dephasing via charge state decoherence in optical control schemes in quantum dots