Measurements of Capacitive Coupling Within a Quadruple-Quantum-Dot Array

• DOI: 10.1103/physrevapplied.12.064049
• Publication Date: 2019-12-23T10:31:01Z
• Authors: Samuel F. Neyens; E.R. MacQuarrie; J.P. Dodson; J. Corrigan; Nathan Holman; Brandur Thorgrimsson; M. Palma; Thomas McJunkin; L.F. Edge; Mark Friesen; S.N. Coppersmith; M.A. Eriksson
• Keywords: Capacitive coupling; Direct coupling

Understanding the interactions that couple gate-defined quantum-dot qubits is an important step to using such devices in quantum computing. For double-quantum-dot with effective charge dipole moment, a capacitive dipole-dipole interaction can yield coherent coupling between neighboring qubits. Here researchers reveal tunability of this capacitive-coupling energy applied gate voltages quadruple-quantum-dot array, tuning from 15 32 GHz. Modeling system as network nodes joined by capacitors, authors demonstrate how pairs double dots depends on various capacitances network.