Nanowerk August 6, 2020
The previous work of an international team of researchers (Russia, USA – Argonne National Laboratory, University of Chicago) dealt with a predefined quantum state. The problem with having to know which state you are reversing is the need to record it. This was not really an issue for the small computer made up of two or three quantum bits, which was used in last year’s study. But scaling up the experiment ramps up the memory requirements. Each additional qubit doubles the amount of memory needed. To address this, the researchers came up with a universal algorithm that is flexible enough to adapt to any scenario. No matter in which way a quantum system has deteriorated, it can be wound back to its “orderly” past. Someday an improved reversal scheme could enable us to confirm the correct functioning of a quantum computer…read more. Open Access TECHNICAL ARTICLE