Quantum Design and Test

Quantum computing uses the principles of quantum physics to process information using qubits instead of classical bits. Unlike bits, qubits can exist in multiple states at once, enabling new ways to solve certain problems more efficiently. Quantum computing is used in early research for applications such as materials modeling, optimization, and cryptography. Building reliable quantum systems requires precise design, control, and measurement infrastructure developed across industry and research institutions, including Keysight Technologies, IBM Quantum, and NIST‑aligned laboratories.

Want to learn more? Check out our blog on the Top 5 Questions About Quantum Computing for a deeper dive into the topic.

A quantum control system is the combination of hardware and software used to drive, synchronize, and measure qubits during quantum experiments. It is used to generate precise electromagnetic or microwave pulses, coordinate timing across channels, and read out qubit states. Quantum control systems are essential for initializing qubits, executing logic gates, and maintaining coherence, with performance validated through calibrated measurements traceable to National Institute of Standards and Technology (NIST) standards.

Quantum control software translates high‑level experimental instructions into time‑aligned control waveforms and measurement sequences. It is used to schedule pulses, automate calibration, manage feedback loops, and process experimental data in real time. This software integrates quantum hardware with external frameworks and toolchains, including those used in IBM Quantum research platforms, enabling reproducible experiments and scalable control across increasing qubit counts supported by Keysight Technologies instruments.

Quantum control is critical because qubits are highly sensitive to noise, timing errors, and environmental disturbances. Precise control is used to reduce error rates, preserve coherence, and improve gate fidelity as systems scale from single‑qubit experiments to multi‑qubit architectures. Without advanced control and validation, quantum systems cannot operate reliably. These control requirements are measured experimentally and benchmarked using standardized methods developed by research institutions such as IBM Quantum and NIST.

Qubit performance is measured using controlled pulse sequences and calibrated readout to extract metrics such as gate fidelity, coherence times (T₁ and T₂), and error rates. These measurements are used to tune control parameters, compare qubit designs, and track system stability over time. Validation commonly relies on randomized benchmarking and repeatable test workflows, with measurement accuracy ensured through instrumentation and calibration practices aligned with NIST standards and implemented by Keysight Technologies.

For a deeper dive into how researchers are navigating quantum validation challenges, check out this detailed Keysight white paper on Navigating the Quantum Revolution.