For instance, calibrating a 100-qubit superconducting quantum computer from scratch can take up to two days, and even recalibrating an already-calibrated system can take an hour or more.

Today, the situation is a lot more nuanced. Progress in building ever bigger quantum computers has, admittedly, been stunning, with several companies developing machines with more than 1000 qubits.

While preparing for the future, Cisco is also making today's technology safer. It is adding Post-Quantum Cryptography (PQC) to its current products to protect normal computers from future quantum ...