The evolution of advanced scientific computing relies heavily on the integration of various specialized processors, including graphics processing units (GPUs), tensor processing units (TPUs), and now quantum processing units (QPUs). To unlock the full potential of QPUs in hybrid computing environments, significant strides must be made in scaling up the number of qubits while simultaneously reducing error rates.
The newly developed 256-qubit quantum computer at the RIKEN RQC-FUJITSU Collaboration Center in Japan will now include a quantum control system from Keysight Technologies. This marks a significant advance in the development of a fault-tolerant quantum computer, enhancing the capabilities of quantum computing in the region.
Quantum control systems are vital for the operational integrity of any quantum computer, facilitating the smooth integration and management of numerous qubits. They serve as the essential interface between classical and quantum systems, translating user commands into precise operations executed by the quantum processor. Additionally, they monitor subtle signal changes that provide insights into qubit states.
The Keysight Quantum Control System accomplishes this by generating and modulating radiofrequency (RF) signals and microwave pulses that interact with qubits, controlling their evolution. These signals are pivotal in preparing qubits in specific states, performing quantum gates, executing quantum algorithms, and reading out final states for optimisation and feedback. Enhanced control techniques and improved physical isolation ensure the fidelity of quantum computations.
Keysight’s QCS features dedicated hardware and software that allow users to program experiments at the quantum system level, alleviating concerns over low-level classical signal management. Key attributes include direct digital conversion (DDC) for microwave signals, which mitigates common drift issues and reduces the need for frequent recalibration.
The QCS also offers a comprehensive software stack and a user-friendly Python API, enabling powerful FPGA-based functionalities without specialised programming knowledge.
Keysight Quantum Engineering Solutions general manager, Dr. Eric T. Holland says: “The capabilities that Fujitsu and RIKEN have brought to market are essential for enabling quantum scientific discoveries and training the next generation of quantum scientists and engineers.”
This collaboration underscores the growing importance of quantum technology in shaping the future of computing and scientific exploration.
