2021/11/22 by Mehdi Arfaoui, Arfaoui, Mehdi, S. Jaziri +1
Physics and Astronomy · #FOS: Physical sciences #Magnetic properties of thin films #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices
paper · pdf · doi:10.48550/arxiv.2111.11621
openalex publication_date 2021/11/22 · openalex created_date 2022/11/02 · openalex updated_date 2026/07/28
A successful and promising device for the physical implementation of electron\nspin-valley based qubits is the Transition Metal Dichalcogenide monolayer\n(TMD-ML) semiconductor quantum dot. The electron spin in TMD-ML semiconductor\nquantum dots can be isolated and controlled with high accuracy, but it still\nsuffers from decoherence due to the unavoidable coupling with the surrounding\nenvironment, such as nuclear spin environments. A common tool to investigate\nsystems like the one considered in this work is the density matrix formalism by\npresenting an exact master equation for a central spin (spin-qubit) system in a\ntime-dependent and coupled to a nuclear spin bath in terms of hyperfine\ninteraction. The master equation provides a unified description of the dynamics\nof the central spin. Analyzing this in more detail, we calculate fidelity loss\ndue to the Overhauser field from hyperfine interaction in a wide range number\nof nuclear spins \N.\n