Visibility of noisy quantum dot-based measurements of Majorana qubits
arXiv:2007.11024 · doi:10.21468/SciPostPhys.10.6.127
Abstract
Measurement schemes of Majorana zero modes (MZMs) based on quantum dots (QDs) are of current interest as they provide a scalable platform for topological quantum computation. In a coupled qubit-QD setup we calculate the dependence of the charge of the QD and its differential capacitance on experimentally tunable parameters for both 2-MZM and 4-MZM measurements. We quantify the effect of noise on the measurement visibility by considering noise in detuning, tunneling amplitudes or phase. We find that on- or close-to-resonance measurements are generally preferable and predict, using conservative noise estimates, that noise coupling to the QDs is not a limitation to high-fidelity measurements of topological qubits.
arXiv comment16 pages, 10 figures; v2: expanded appendices and minor improvements; v3: expanded appendices and minor improvements
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