Proof of the usefulness of a quantum computer. Quantum supremacy means that a quantum computer is capable of solving a problem that would take many years with a classical computer.

**A First Claim**

In 2019, Google claimed its Sycamore quantum computer solved a mathematical problem in three minutes that would take a supercomputer 10,000 years. However, this has been refuted by IBM and others, stating that it would only take a few weeks of classical computation. In addition, the problem that was solved was considered less relevant for all practical purposes. See quantum computing and quantum secure.

**Another Definition**

In 2019, Google claimed its Sycamore quantum computer solved a mathematical problem in three minutes that would take a supercomputer 10,000 years. However, this has been refuted by IBM and others, stating that it would only take a few weeks of classical computation. In addition, the problem that was solved was considered less relevant for all practical purposes. See quantum computing and quantum secure.

All other reproduction requires permission

Copyright 1981-2024

The Computer Language Company Inc.

All rights reserved