Spin qubits trapped in quantum dots#
Semiconductor quantum dot spin qubits, a leading platform for scalable quantum computing, require precise charge and spin control using customized fast voltage pulses and microwave bursts.
This page provides an overview of how Qblox control electronics can be used to operate such quantum processors. To support these experiments, Qblox offers a range of products specifically designed for spin-qubit systems in quantum dots, providing precise timing control and exceptional signal fidelity. In the setups described below, the Cluster serves as the central mainframe that hosts the various control and readout modules.
For charge state readout, the QRM is used.
For microwave control, the QCM-RF provides the required functionality.
For fast pulsing, the QCM is employed.
Architecture
Example layout of a QPU containing five spin qubits controlled using Qblox control electronics.#
The example above illustrates a typical spin-qubit QPU based on semiconductor quantum dots. This architecture consists of five quantum dots arranged to host spin qubits, each controlled through dedicated barrier and plunger gates. A central electron spin resonance (ESR) line provides microwave excitation for spin manipulation, while a nearby charge sensor enables state readout.
All gate and barrier lines are equipped with Bias-Ts, allowing the combination of fast control pulses with DC biasing on the same line. This configuration enables high-speed qubit operations without sacrificing stability in the electrostatic potential of the dots.
Tuneup
