(HPC.Wire) Intel and QuTech have published key findings in quantum research to address the “interconnect bottleneck” that exists between quantum chips that sit in cryogenic dilution refrigerators and the complex room-temperature electronics that control the qubits. The innovations mark an important milestone in addressing one of the biggest challenges to quantum scalability with Intel’s cryogenic controller chip Horse Ridge.
A key bottleneck for quantum computing lies between the quantum chip stored in low, cryogenic temperatures in dilution refrigerator and room-temperature control electronics that control the qubits. Getting the control electronics to operate at high fidelity at cryogenic temperatures is key to overcoming what is referred to as the “interconnect or wiring bottleneck.” Intel took the first step to address this challenge when it introduced Horse Ridge, a cryogenic control chip for qubits built using Intel’s 22nm FinFET Low Power technology. A second generation of the chip was introduced last year. Horse Ridge brings key control functions for quantum computer operation into the cryogenic refrigerator – as close as possible to the qubits themselves – to streamline the complexity of control wiring for quantum systems.
This latest research successfully demonstrates results from randomized benchmarking that show a commercial CMOS-based cryo-controller achieving coherent control of a two-qubit processor at the same levels of fidelity (99.7%) as room-temperature electronics. This marks a key research milestone in the field of cryo-electronics for quantum computing.