Quantum computers has been on news a lot lately. Scientists claim to have achieved “quantum supremacy”, a breakthrough that could change computing history. But has that breakthrough really happened or not?
Google Confirms Achieving Quantum Supremacy
Google scientists confirmed in a blog post that their quantum computer had needed just 200 seconds to solve a problem that they claim would take the world’s fastest supercomputer 10,000 years to complete.
The team first ran the algorithm last spring using a 54-qubit processor called “Sycamore.”
While the achievement is called quantum supremacy, it doesn’t mean that quantum computers are suddenly more capable than classical computers in more than just a few special applications.
IBM: No, Google Didn’t Achieve Quantum Supremacy
In a research paper shared Monday, IBM contesting the a leaked Google paper pointing to a Google quantum computer having better performance than a classical supercomputer.
IBM casts doubt on Google’s claims of quantum supremacy
“It’s a great scientific achievement,” says physicist Chad Rigetti, founder and CEO of Rigetti Computing in Berkeley and Fremont, California, which is developing its own quantum computers. “Google called their shot,”
For certain computational problems, all potential solutions can be thought of as quantum waves simultaneously sloshing among the qubits.
Quantum supremacy using a programmable superconducting processor
To achieve quantum supremacy, we made a number of technical advances which also pave the way towards error correction. Researchers developed fast, high-fidelity gates that can be executed simultaneously across a two-dimensional qubit array. They also calibrated and benchmarked the processor using cross-entropy benchmarking.