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Physicists Create New Technique To Control Qubits – The Building Blocks of Quantum Computing

A research team of two physicists at the University of Oregon Quantum computing, A potentially important step in making such a computer more accurate and useful.

Physicists David Alcock and David Wineland are the founders of the new Oregon Ion Institute, which was recently located beneath Willamette Hall. They are one of the 12 authors of a new treatise based on experiments at the National Institute of Standards and Technology in Boulder, Colorado. Both scientists previously worked at Colorado Labs, but continued to work together on the project after coming to UO in 2018.

Techniques listed in the journal NatureIncludes the use of trapped ion qubits or qubits in quantum computing and simulation. According to physicists, they can improve the operation of quantum computers, yet they are too computationally error-prone to be effective tools.

The problem with quantum computers is that their logic gates, the tools used to perform basic logic functions in computing, are “really bad.”

“They have a 1 percent chance of failing,” he said. “If you can (operate) about 100 times, garbage will be generated.”

“The whole field is currently in stages due to the existence of errors, and it is not possible to perform long-term calculations or simulations of practical value on the machine,” Winelands added.

The goal is to perform 10,000 operations without errors and add a layer of checks to fix any errors that occur.

“We want to reach that point,” Alcock said. “Then you can use the quantum computer for something useful. Now it’s just a toy.”

According to Winelands, the trapped ions are like a bowl of marbles with certain magnetic properties. Physicists can apply force to ions in a variety of ways, including lasers, Alcock said. However, while lasers are expensive and complex machines, using magnetic force to create logic gates is cheaper and more practical because they can be generated directly in integrated circuits.

“What we’ve done here is to show that these techniques work the same as they’ve done logic gates before,” he said.

Google and IBM are one of the for-profit companies that have an army of engineers working on such issues, but academic physicists have better, more basic techniques to solve them. I’m trying to show that.

“We have shown that we can do it in a technically easy way,” he said.

If physicists and engineers can make quantum computers more reliable and run with sufficient capacity, they can simulate other systems, Winelands said. For example, a quantum computer can simulate the action of molecules used in drug therapy without having to synthesize them in the laboratory.

“There are some very practical and useful results,” said Winelands. “We are just scratching the surface.”

Quantum computing is based on the principles of quantum theory that explain the behavior of matter at the atomic and subatomic levels. A qubit, or qubit, is a basic unit of information in quantum computing, much like a bit is a basic unit of traditional computing. Unlike the 1 or 0 classic bit, the qubit can be both 1 and 0 at the same time.

Quantum computing has existed since around 1995 when the Massachusetts Institute of Technology mathematician Peter Shor devised an algorithm that used the idea of ​​quantum logic to efficiently decompose many into a series of simpler equations. This is a process known as factorization, the Winelands. Said. This was important because most modern cryptographic algorithms derive security because many cannot be factored.

See also: R. Srinivas, SC Burd, HM Knaack, RT Sutherland, A. Kwiatkowski, S. Glancy, E. Knill, DJ Wineland, D. Leibfried, AC “High Fidelity Laser Free Universal Control of Trapped Ion Cubits” Wilson, DTC Allcock, DH Slichter, September 8, 2021 Nature..
DOI: 10.1038 / s41586-021-03809-4

Allcock and Wineland joined the UO in 2018. Wineland was co-winner of the Nobel Prize in Physics in 2012 for his work on the manipulation and measurement of individual quantum systems. He is Philip H in the Faculty of Physics. Holds the Knight Distinguished Research Chair. Allcock is a senior researcher at the new Oregon Ion Institute.



Physicists Create New Technique To Control Qubits – The Building Blocks of Quantum Computing Source link Physicists Create New Technique To Control Qubits – The Building Blocks of Quantum Computing

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