Harvard physicists created the first logical quantum processor programmable, capable of encoding up to 48 logical qubits and perform hundreds of logic gate operations.
Published in the journal Nature, this Key milestone looking for calculations stable and scalable quantum technology, ultra high speed What will allow revolutionary achievements in a variety of fields, including medicine, science and finance, the university said in a statement.
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The system is first demonstration execution large-scale algorithms on a quantum computer with bug fixheralding the emergence of the first fault-tolerant or reliably trouble-free quantum computing.
Professor Mikhail Lukin, who led the study, described achievement as a possible turning point similar to the early days in the field artificial intelligence: correction ideas quantum errors and fault tolerance, long theorized, are beginning to bear fruit.
I think this is one of the moments when it becomes clear that something special is coming. Although there are still challenges ahead, we hope that this new breakthrough will significantly speed up progress in creating useful large-scale quantum computers.
— Lukin reported this.
V quantum computinga quantum bit or “qubit” is a unit of measurement information, just like a binary bit in classical computing. For more than two decades, physicists and engineers have shown the world that quantum computing is in principle possible by manipulating quantum particles (whether atomsions or photons) to create physical qubits.
But successfully exploiting the weirdness of quantum mechanics for calculations is more difficult than just accumulating sufficient quantity a large number of qubits that are inherently unstable and prone to leaving their quantum states.
Real”kingdom coinsare so-called logical qubits: packets of redundant and error-correcting physical qubits that can Store information for use in a quantum algorithm.
creating logical qubits controllable units (such as classical bits) have been a fundamental obstacle to this field, and it is generally accepted that until quantum computers will be able to reliably work with logical qubits, the technology will not be able to truly take off.
To date best computer systems It has been shown that there are one or two logical qubits and a quantum gate operation in between (similar to one code unit).
The Harvard team’s progress is based on several years of work in a quantum computing architecture known as atomic matrix neutral substances first developed by Lukin’s laboratory.
He key component system is a block rubidium atoms ultra-cold suspension, in which atoms (the physical qubits of the system) can move and pair up (or “entangle”) in the middle of a calculation.
pairs of atoms intertwined, they form doors that power units calculations. The team had previously demonstrated low error rates in interleaving operations by demonstrating reliability of your system matrix of neutral atoms.
with him quantum processor It is logical that researchers are now demonstrating control Parallel multiplexing of a complete stack of logical qubits using lasers. This the result is more effective and scalability than the need to control individual physical qubits.
He the team will continue to work demonstrate more types of operations with your 48 logical qubits and configure your system to work continuouslyinstead of manually switching cycles like you are doing now.