According to a report on the website of the US “Science” magazine on September 15, IBM has unveiled its roadmap for quantum computer, which includes making a quantum computer containing 1,000 qubits by 2023. It is reported that IBM's most advanced quantum computer contains just 65 qubits. IBM's new plan also includes a medium-sized quantum computer with 127 qubits in 2021 and 433 in 2022, and plans to create a quantum computer with one million qubits one day in the future. Researchers said a quantum computer with 1000 qubits is a particularly important milestone on the road to a mature quantum computer. Although such a machine still can't achieve the full potential of a quantum computer, such as cracking the current Internet encryption scheme, it is enough to find and correct countless small errors usually plagued qubits. The machine will be an "inflection point" from which researchers will shift their focus from reducing the error rate of single qubits to optimizing the architecture and performance of the entire system. IBM is not the only player in the quantum computer contest. Google is also a strong contender. In a paper published in “Nature” on 23 October last year, Google researchers said they had successfully demonstrated "quantum hegemony": its 53-qubit system took about 200 seconds to do what a conventional supercomputer would take 10,000 years to do. "Quantum hegemony" is a term coined by John Preaskill, a physicist at the California Institute of Technology in the US, to mean that "after an exponential increase in storage and communication bandwidth, quantum computers possess capabilities that traditional supercomputers lack".