In a quantum computer, the basic unit of memory is a quantum bit or qubit. Qubits are made using physical systems, such as the spin of an electron or the orientation of a photon.

Feb 3, 2026 · Technology Nobel laureate says he'll build world’s most powerful quantum computer John Martinis has already revolutionised quantum computing twice. Now, he is working on another radical …

Dec 29, 2025 · In February, Microsoft unveiled a new quantum computer called Majorana 1 and it quickly became one of the most controversial devices in quantum computing. Majorana 1 caused …

Oct 13, 2025 · Claims that one quantum computer is better than another rest on terms like quantum advantage or quantum supremacy, fault-tolerance or qubits with better coherence – what does it all …

Dec 19, 2025 · Columnist and Technology Quantum computers turned out to be more useful than expected in 2025 Rapid advances in the kind of problems that quantum computers can tackle …

Sep 18, 2025 · For all the hype surrounding quantum computers, the technology can sometimes appear to be a solution in search of a problem. Scientifically impressive, but not yet obviously useful in the …

Dec 30, 2024 · IBM is planning to build the largest quantum computer so far, by linking together smaller machines to create one with a recording-breaking number of quantum bits, or qubits. The firm’s first ...

Jan 5, 2026 · What is it about quantum computers that makes them more powerful than conventional machines? A new experiment shows that the property of “quantum contextuality” may be a key …

Sep 24, 2025 · A device with more than 6000 quantum bits, or qubits, has smashed a previously-held record and is the first step towards building the largest quantum computer yet.

Nov 12, 2025 · As a contender in the race to build an error-free quantum supercomputer, IBM has been taking a different tack than its most direct competitors. Now, the firm has unveiled two new quantum …