Quantum computing steps forward with 50-qubit prototype

IBM's quantum computer

CHOMPING AT THE QUBIT  IBM announced two new advances to its quantum computing hardware (cooling system and other infrastructure shown): a 20-qubit processor that will be available commercially and a 50-qubit prototype currently undergoing testing.

IBM Research/Flickr

Bit by qubit, scientists are edging closer to the realm where quantum computers will reign supreme.

IBM is testing a prototype quantum processor with 50 quantum bits, or qubits, the company announced November 10. That’s about the number needed to meet a sought-after milestone: demonstrating that quantum computers can perform specific tasks that are beyond the reach of traditional computers (SN: 7/8/17, p. 28).

Unlike standard bits, which represent either 0 or 1, qubits can indicate a combination of the two, using what’s called quantum superposition. This property allows quantum computers to perform certain kinds of calculations more quickly. But because qubits are finicky, scaling up is no easy task. Previously, IBM’s largest quantum processor boasted 17 qubits.

IBM also announced a 20-qubit processor that the company plans to make commercially available by the end of the year.

Physics writer Emily Conover has a Ph.D. in physics from the University of Chicago. She is a two-time winner of the D.C. Science Writers’ Association Newsbrief award.

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