SPIN QUBIT QUANTUM DEVICE READ BY IMPEDANCE MEASUREMENT

摘要

Quantum device (100) with spin qubits, comprising: - a data qubit and a measurement qubit (102) produced in a semiconductor layer and coupled to each other by a tunnel junction produced in the semi-conductor layer. -conductor, each comprising a quantum dot and a control gate; - an inductance coupled to the gate of one of the qubits or to another gate capacitively coupled to one of the qubits, the inductance and a capacitance formed by said gate forming an LC circuit; - a first input terminal (122) coupled to the LC circuit and receiving a periodic control voltage of frequency fr equal to the resonant frequency of the LC circuit; - a voltage amplifier (112) comprising an input coupled to the gate to which the inductance is coupled; - an output terminal coupled to an amplifier output. Figure for the abstract: Figure 1.