Visibility of noisy quantum dot-based measurements of Majorana qubits

Autor:	Khindanov, Aleksei, Pikulin, Dmitry, Karzig, Torsten
Rok vydání:	2020
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Quantum Physics
Zdroj:	SciPost Phys. 10, 127 (2021)
Druh dokumentu:	Working Paper
DOI:	10.21468/SciPostPhys.10.6.127
Popis:	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 $1/f$ 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. Comment: 16 pages, 10 figures; v2: expanded appendices and minor improvements; v3: expanded appendices and minor improvements
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2007.11024 Zobrazit plný text záznamu View this record from Arxiv