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Interplay of charge and spin coherence in Landau-Zener-Stuckelberg-Majorana interferometry

Author(s): Ribeiro, Hugo; Petta, Jason R; Burkard, Guido

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Abstract: We study Landau-Zener dynamics in a double quantum dot filled with two electrons, where the spin states can become correlated with charge states and the level velocity can be tuned in a time-dependent fashion. We show that a correct interpretation of experimental data is only possible when finite-time effects are taken into account. In addition, our formalism allows the study of partial adiabatic dynamics in the presence of phonon-mediated hyperfine relaxation and charge-noise-induced dephasing. Our findings demonstrate that charge noise severely impacts the visibility of Landau-Zener-Stuckelberg-Majorana interference fringes. This indicates that charge coherence must be treated on an equal footing with spin coherence.
Publication Date: 15-Jun-2013
Electronic Publication Date: 26-Jun-2013
Citation: Ribeiro, Hugo, Petta, JR, Burkard, Guido. (2013). Interplay of charge and spin coherence in Landau-Zener-Stuckelberg-Majorana interferometry. PHYSICAL REVIEW B, 87 (10.1103/PhysRevB.87.235318
DOI: doi:10.1103/PhysRevB.87.235318
ISSN: 1098-0121
Type of Material: Journal Article
Journal/Proceeding Title: PHYSICAL REVIEW B
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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