Zurich Instruments has developed the first quantum analyzer to provide direct readout of superconducting and spin qubits.

The SHFQA Quantum Analyzer operates at 8.5GHz to provide a qubit readout system designed for experimentalists working on superconducting or spin qubits. Conceived as the next generation of quantum computing instrumentation, the SHFQA combines signal generation at microwave frequencies with direct qubit readout and real-time multi-state discrimination.

With the SHFQA, reading out frequency-multiplexed qubits on up to 4 readout lines becomes a fast, high-fidelity operation that does not rely on complex mixer calibration. As a single SHFQA can measure up to 64 qubits, it covers many functionalities that would otherwise require larger instrument racks and complex cabling arrangements.

This allows the SHFQA to read out the state of up to 64 qubits, 32 qutrits or 20 ququads in real time and with optimal signal-to-noise ratio. With the analysis chain and additional features such as multi state discrimination and rapid resonator spectroscopy, this instrument is ready for use with the most demanding quantum algorithms.

As quantum processors become larger and more complex physical systems, the corresponding increase in footprint for the classical readout devices that measure quantum chips is a clear instrumentation challenge. “Current state-of-the-art control and readout systems combine several instruments and analog mixing stages to reach the microwave resonator frequencies needed for qubit readout. Keeping all pieces of equipment calibrated and synchronized over long time periods is tedious and error-prone,” said Dr Tobias Thiele, Application Scientist for Quantum Technologies at Zurich Instruments.

“Now consider what happens when you plan to scale up your system to hundreds of qubits: the effort with cabling and system tune-up, the number of required instruments – they simply do not scale in your favour,” he said.

The quantum analyzer comes with 2 or 4 readout channels, each of which can optimally discriminate the quantum states of 16 qubits, 8 qutrits or 5 ququads coupled to resonators with frequencies

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Source: https://www.eenewseurope.com/news/quantum-analyzer-measures-spin-qubits-directly

World news – CA – Quantum Analyzer measures spin qubits directly

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