Abstract
A spectroscopic approach to measuring a charge qubit placed in a waveguide consisting of three microcavities (a photonic molecule) is discussed. The logical states of a qubit are represented by the single-electron orbitals of a semiconductor double quantum dot. The impact of different factors that cause deviations of the system’s parameters from specified values is investigated. The possibility of controlling the spectrum of a photonic molecule using a local change in its dielectric properties in order to optimize the qubit measurement procedure is analyzed. The functions of the measuring contrast and signal-to-noise ratio are calculated depending on the main parameters of the system.
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The investigation was supported by Program no. 0066-2019-0005 of the Ministry of Science and Higher Education of Russia for Valiev Institute of Physics and Technology of RAS.
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Translated by E. Bondareva
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Tsukanov, A.V., Kateev, I.Y. Photonic Molecule with Mechanical Frequency Tuning for the Optical Measurements of a Semiconductor Charge Qubit. Russ Microelectron 50, 75–91 (2021). https://doi.org/10.1134/S1063739721020098
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DOI: https://doi.org/10.1134/S1063739721020098