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.

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 …

Oct 24, 2023 · The world’s first quantum computer to exceed 1000 qubits has more than double that of the previous record holder, IBM’s Osprey machine, which has 433 qubits. Though having more …

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 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.

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 …

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 …

Mar 10, 2025 · Researchers have criticised Microsoft's new Majorana 1 quantum computer, saying the company has made claims about the way it works that aren't fully backed up by scientific evidence

Feb 11, 2025 · Technology Quantum computers have finally arrived, but will they ever be useful? Hundreds of quantum computing firms around the world are racing to commercialise these once …

Jun 23, 2025 · Physics At last, we are discovering what quantum computers will be useful for Quantum computers have been hyped as machines that can solve almost any problem.