Google unveils quantum computer breakthrough; critics say wait a qubit

BERLIN/SAN FRANCISCO (Reuters) - Alphabet Inc's Google said on Wednesday it had achieved a breakthrough in computing research by using a quantum computer to solve in minutes a complex problem that would take today's most powerful supercomputer thousands of years to crack.Google researchers expect that quantum computers within a few years will fuel advancements in fields such as artificial intelligence, materials science, and chemistry. The company is racing rivals including IBM Corp and..