The recently created quantum computer of Quantinuum set a new world record, surpassing the performance of the Google Sycamore machine by 100 times. Using a 56-cube computer H2-1, scientists conducted a number of experiments to evaluate the performance and quality of the cubes used. Research results were published June 4 in the database of Arxiv.
To demonstrate the capabilities of the quantum computer, the QUANTINUUUM specialists used the well-known algorithm that measures the noise level and errors of cubes. Quantum computers can perform calculations in parallel due to the laws of quantum mechanics and the confused cubes, which allows them to instantly influence each other. In contrast, classic computers work sequentially.
An increase in the number of cubes in the system exponentially increases the power of the machine. Scientists predict that in the future, quantum computers will be able to perform complex calculations in seconds, while the classic supercomputer will need thousands of years. The achievement of the moment when quantum computers will surpass the classic ones is known as “quantum superiority”. However, this will require a quantum computer with millions of cubes, as they are subject to errors and require many cubes to correct them. Therefore, many researchers focus on creating more reliable qubits.
The team Quantinuum tested the accuracy of the output h2-1 using the linear cross-country reference -Nantropia (Cross Entropy Benchmark, XEB), which evaluates the results on the scale from 0 (all results are erroneous) to 1 (accurate results). In 2019, Google checked her quantum computer Sycamore using XEB and showed that it can be calculated in 200 seconds, which would take 10,000