![]() ![]() Today's machines only have a few dozen qubits at best, and many expect quantum computers to need thousands of logical qubits to become really useful. Using the smallest possible number of physical qubits to make a logical qubit is an important consideration in improving quantum computers. Honeywell didn't actually perform any computation during its demonstration, but showed that it could initialize the system, correct qubit errors during operations, and read the results afterward. Different aspects of QEC, including Honeywell's logical qubits, should enable more advanced algorithms. Quantum error correction is a method for detecting and fixing qubit errors so calculations can run longer. Seven of the qubits stored data while the remaining three "ancilla" qubits shepherded the error correction process, which is governed by a conventional computer that steers qubits back on track when a problem is detected. Honeywell demonstrated its technique on its 10-qubit H1 quantum computer. Quantum computers could crack today's encrypted messages. ![]() Honeywell fires up the H1, its second-generation quantum computer.Google quantum computer leaves old-school supercomputers in the dust. ![]()
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