Honeywell claims to have built the highest-performing quantum computer available
Multinational conglomerate Honeywell International Inc. is claiming to have built the highest-performing quantum computer available today. It made the announcement in a blogpost on its website. The company further claims that its H0 quantum computer has a quantum volume score of 64—making it twice as powerful as any other quantum computer available.
Because they are still in their infancy, quantum computers are difficult to compare—thus, it is difficult to tell which of two machines is more powerful. It was for this reason that IBM came up with the quantum volume as a metric—it is a number calculated by taking into account several features of a quantum computer, starting with its number of qubits—other factors include measurements of errors, crosstalk and connectivity. Unsurprisingly, the prior record was held by IBM, which built a quantum computer with a quantum volume of 32.
Honeywell’s H0 computers make use of an ion-trap-type chamber that contains the qubits. The company describes the chamber as approximately the size of a basketball—one with portals on its face to admit laser light. Inside is a vacuum that is kept near absolute zero (-441F). Electric fields levitate the atoms and lasers are used to carry out operations. The company notes that there is also a lot of hardware surrounding the chamber that controls and supports its operations—they occupy a table 20 feet long and five feet wide.