Google has now officially confirmed that it’s achieved quantum supremacy through an article published in the scientific journal Nature. However, Google’s papers were initially leaked back in September, which was disputed by competitors. As now the research papers are public, all scientific communities can study and check what Google claims.[wpinsertshortcodead id=”zxikm5d3e04a8f1451″]
Quantum computing uses quantum mechanics principles like superposition, entanglement, etc. to perform computing. Traditional computing works with bits; all information is processed and exchanged in 1/0 or true/false signal. However, the quantum computer is based on qubits. So, Quantum supremacy encapsulates the ability of quantum computers to perform calculations, which the latest traditional computer can’t.
According to Google’s papers, they achieved “quantum supremacy” by using their Sycamore 53 qubits processor, which took 200 seconds to perform a calculation, whereas the world’s fastest supercomputer would have taken 10,000 years to do the same. Because of the quality of control over the qubits, they were able to achieve this.
However, IBM, who operates the supercomputer disputing this Google’s claims saying that the equivalent task can be performed on a classical computer in 2.5 days with higher fidelity instead of 10,000 years. The company also mentioned, “This is in fact a conservative, worst-case estimate, and we expect that with additional refinements the classical cost of the simulation can be further reduced.” IBM also argued by saying that Google’s understanding of quantum supremacy is wrong because the meaning proposed by John Preskill was to “describe the point where quantum computers can do things that classical computers can’t, this threshold has not been met.” You can check the full IBM blog where it has mentioned all this.
Besides, many research communities welcomed this achievement. Google’s CEO, Sunder Pichai, in an interview with MIT Technology Review, compares it to the first flight by Wright Brothers, which flew for 12 seconds showing us the possibility that the plane could fly. Though it could take some years to come, which will have a significant impact on our lives, it’s an essential step towards technology.