IBM Unveils Quantum Roadmap, Plans 1,000-Qubit Chip by 2023 – ExtremeTech

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IBM is one of the companies jockeying for position in the nascent field of quantum computing and the company thinks it has a roadmap to develop a universal quantum computer with up to 1,000 qubits. Such a chip would be capable of more complex workloads than any existing chip. Furthermore, IBM claims that even this 1,000-qubit CPU, codenamed Quantum Condor, is just the beginning, with long-term plans for a “million-plus” qubit chip at some unspecified point in the future.To build the Quantum Condor chip and those to come after it, IBM is investing in a dilution refrigerator larger than any previously built to handle the cooling. Dilution refrigerators are capable of cooling devices down to 2 milliKelvin by using helium-3 and helium-4 isotopes. There are two kinds of dilution refrigerator — wet and dry — and it looks as though IBM is building the dry kind based on its work with companies like Blufors, which specializes in cryogen-free dilution refrigerators.Just this month, IBM released its 65-qubit Quantum Hummingbird system, which offers capabilities like 8:1 readout multiplexing, meaning eight qubit signals are combined to reduce wiring complexity and improve …

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