Some experts believe that all the effort that is being carried out in the field of quantum computing does not go anywhere. One of the members of the scientific community more critical of quantum computers He is the Israeli mathematician Gil Kalai, a professor at Yale University. According to this researcher, the increase in the number of states of quantum systems and their complexity will cause them to end up behaving like classical computers, so the superiority of the former will end up evaporating.
However, the absence of unanimous support by the scientific community should not tarnish the notable effort and advances that many research groups are doing, some of them in Spanish institutions such as the CSIC and others integrated into the structure of companies that have very bulky resources, such as IBM, Google or Intel, among others. In fact, as expected, the latter defend that the long -awaited error correction will reach quantum computers and will allow them to face a much wider range of problems than that of current prototypes.
Terra Quantum bets on quantum severity to correct errors
The main problem facing quantum computers in the field of error correction is noise, understood as the disturbances that can alter the internal state of the cubits and introduce calculation errors. The strategy for which many of the research groups that are involved in the development of quantum computers are opting for monitoring the operations carried out by the cubits to identify real -time errors and correct them. The problem is that from a practical point of view this strategy is very challenging.
QMM technology reduces errors by up to 35% in current quantum processors
Logical cubits represent a way to overcome the difficulty of the use of hardware or physical cubits, which are extremely noise sensitive, and, therefore, prone to make mistakes. Each logical cubit is constructed abstractly on several physical or hardware cubits, so that a single logical cubit encodes a single cubit of quantum information, but with redundancy. It is precisely this redundancy that allows to detect and correct the errors that are present in the physical cubits.
The error correction strategy proposed by the researchers of the Swiss Terra Quantum company is not an alternative to the solutions in which we have just inquired; It is a complement. In fact, as explained in the article they have published in Advanced Quantum Technologies, their QMM technology (Quantum Memory Matrix) Reduce errors by up to 35% in current quantum processors. And, in addition, it reaches 94% fidelity using ten times less cubits than conventional methods. An important note: Terra Quantum’s scientific article has been reviewed by pairs.
Terra Quantum has tested its QMM technology in IBM superconductor processors, and works. It only requires adding a quantum circuit that does not alter the architecture of the processor, although it is very ingenious. In fact, its operation is inspired by A principle of quantum gravity which maintains that the space-time continuum can be described as a network of me memory cells.
It is a complicated idea, it is true, but the really important thing is that we know that this theoretical concept is the one that has inspired Terra Quantum scientists the design of their quantum circuit of errors suppression. Anyway, this innovation joins the effort that IBM, the MIT and other organizations are making to invite us to tie the future of quantum computers with a very reasonable optimism.
Image | IBM
More information | Advanced Quantum Technologies
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