IBM transfers quantum information between chips with 99% accuracy

IBM researchers connected two 120-qubit quantum chips with four long couplers and achieved an average quantum information transfer fidelity of 99%. The highest figure was 99.29%, ScienceAlert reports.

Connection between quantum modules

For the experiment, the team used four 80-centimeter-long L-shaped couplers made of superconducting aluminum. They transmitted qubit quantum states between the processors. Qubits are the basic elements of quantum computers: unlike conventional bits, which have a value of 0 or 1, they can remain in a state of superposition until measurement.

The modular architecture makes it possible to scale quantum systems by combining several chips rather than only increasing the number of qubits on a single processor. In the paper, the researchers described this solution as a practical path to creating several identical connections between large quantum processors…