Quantum: New silicon qubit tester will save years

A silicon qubit tester recently acquired by CEA-Leti will substantially speed up quantum computer research. The tester can measure the electrical performance of several hundred qubits processed on a 300 mm wafer at 1.7 K (-271.3 °C). The qubits that make it through these tests will then be tested individually on a cryostat at Institut Néel at temperatures below 100 mK, a requirement for integration into quantum processors.

It takes several months to fabricate a wafer of qubits at CEA-Leti, and several more months to unit-test them at Institut Néel and Irig. Therefore, the time this batch testing step will save the CEA/CNRS silicon quantum program will be measured in years. There are only two testers of this kind in the world. The other one is at Intel in the United States.

Contact: camille.giroud@cea.fr

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