Physicists have developed a new architecture called LHZ, which is probably the foundation The next generation of quantum computers will be. Stay with us.
yet still Computing power of quantum computers It is very low and increasing it is considered a big challenge. For this reason, physicists are looking to design a new architecture for a universal quantum computer that overcomes such limitations and could soon be the basis of the next generation of quantum computers.
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The next generation of quantum computers is coming
Quantum bits (qubits) in a quantum computer are both the computing unit and the memory unit; Since quantum information cannot be copied, its data cannot be stored in memory like in a classical computer. Due to this limitation, all qubits of a quantum computer must be able to interact with each other. Well, such a thing is a big challenge for Building powerful quantum computers Creates.
Around 2015, theoretical physicist Wolfgang Lechnerwith Philip Hawke and Peter Zoelleraddressed this problem and proposed a new architecture for a quantum computer that now LHZ architecture (LHZ) is named after the same authors.
Wolfgang Lechner of the Department of Theoretical Physics at the University of Innsbruck in Austria said:
“This architecture was originally designed for optimization problems”.
“In the process, we reduced the complexity of the architecture to a minimum to eliminate these optimization problems as much as possible; In this architecture, physical qubits do not represent individual bits, but instead encode entangled networks between bits.”
Wolfgang Lechner continues:
“This means that all the qubits no longer have to interact with each other.”
Lechner and his group have shown that this concept of balancing qubits could be suitable for a universal quantum computer.
A complex operation made simple!
Balanced qubit computers can perform operations between two or more qubits on a single qubit. Michael Fellner of the Wolfgang Lechner team explains:
“Current quantum computers perform such operations well on a small scale, but as the number of qubits increases, the problem begins and the implementation of these quantum gates becomes more and more complex.”
Leave a brief description for Equilibrium qubit Give: In general, since the data transmission is not error-free, during the transmission the received data are not exactly the same as the sent data. Therefore, a bit is sent as a parity bit along with the data to determine whether the data has been transmitted correctly or not.
Two studies published in Physical Review Letters and Physical Review A show that Balanced computers They can, for example, perform quantum Fourier transforms—the fundamental qubit building blocks of many quantum algorithms—with far fewer computational steps and thus faster.
“The parallelism of our architecture means that, for example, the famous Shor’s algorithm for factoring numbers can be implemented much more efficiently.”
Evil Algorithmis a quantum algorithm to decompose numbers into first-order time factors in polynomial time. The name of this algorithm, which was formulated in 1994, is named in honor of Peter Sher.
Two-step error correction in the next generation of quantum computers
Also, this new concept provides more efficient hardware error correction. Since quantum systems are very sensitive to perturbations, computers must also continuously correct errors, so significant resources must be devoted to protecting quantum data, which greatly increases the number of qubits required. About this, Anette Messinger and Kilian Ender say:
“Our model works with two-stage error correction, that is, the first type of error (bit rotation error or phase error) is corrected by the hardware used, and to achieve this, we test preliminary experimental approaches on various platforms.”
“Another type of error can be detected and corrected through software,” Messinger and Ender added.
This is an effort to manage resources The next generation of quantum computers global allows them to come true. The spin-off company Quantum Balanced Computers, founded by Wolfgang Lechner and Magdalena Hauser, is currently working in Innsbruck with science and industry partners on a possible implementation of the new model.
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Source:University of Innsbruck