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The new material shows a high potential for quantum computation



  The new material shows a high potential for quantum computation
Peng Wei is a UC Riverside condensed matter physicist, studying the quantum states of electrons in new materials. Sincerely, I. Pittalwala, UC Riverside.

A joint team of scientists from the University of California, Riverside and the Massachusetts Institute of Technology approached the confirmation of the existence of an exotic quantum particle called Fermion Mayorana, the crucial quantum fault calculation ̵

1; a type of quantum error calculation at work.


Quantum calculation uses quantum phenomena to perform calculations. Majorana's farms exist at the border of special superconductors, called topological superconductors, which have a superconducting opening in their interiors and ports of Majorohan farms outside their borders. Majorana's farms are one of the most sought-after objects in quantum physics because they are their own antiparticles, they can divide the quantum state of electrons in half and follow different statistics compared to electrons. Although many claim to have identified them, scientists still can not confirm their exotic quantum nature.

The UCR-MIT team has overcome the challenge by developing a new gold based heterostructure material system that can potentially be used to demonstrate the existence and quantum nature of Mayorana farms. Heterostructure materials are composed of layers of drastically different materials that together show completely different functionalities compared to their individual layers.

"It is very non-trivial to find a material system that is a natural topological superconductor," said Peng Wei. , an assistant professor of physics and astronomy and a condensed matter experimenter who led the research at Physical Review Letters with Jagadeesh Moodera and Patrick Lee of MIT. "The material must meet a few stringent conditions to become a topological superconductor."

The Mayorana farm, which is considered to be half of the electron, is predicted to be found at the ends of a topological superconductor. Interestingly, two Mayorana farms can combine each other to form an electron, allowing the quantum states of the electron to be stored non-locally – an advantage for quantum-tolerant quantification.

In 2012, MIT's theoreticians led by Lee assume that the heterostructures of gold can become a topological superconductor under strict conditions. The experiments performed by the UCR-MIT team have achieved all the necessary conditions for gold heterostructures.

"Achieving such a heterostructure is very demanding, because first of all, physical material challenges need to be addressed," said Wei, who returned to the university in 2016 by the Massachusetts Institute of Technology

Wei explained that the study shows superconductivity, magnetism and spin-orbital electron coupling, which can coexist in gold – a difficult challenge to meet – and manually mix with other materials through heterostructures.

"Superconductivity and magnetism usually do not exist in the same material," he said.

Gold is not a superconductor, he added, nor did he have any electrons on his surface. The first time that superconductivity can be brought to the surface of gold that requires new physics, he said. "We show that it is possible to make the surface of the gold surface superconductor that has never been shown before."

The study also shows that the electronic density of superconductivity in the superficial states of gold can be tuned.

"This is important for future manipulations of the Mayoran farms needed for a better quantum calculation," Wei said. Also, the surface of the gold surface is a two-dimensional system that is naturally scalable, which means that it allows the construction of the Mayorana fermentation chains.

Besides Wei, Moodera and Lee, the research team includes Sujit Manna and Marius. MIT's Eich.
Calculation is faster with quasi-particles


More Information:
Peng Wei et al. Surface superconductivity of noble metallic gold and its regulation of the level of Farms from the ESE dielectric, Physically explicit letters (2019). DOI: 10.1103 / PhysRevLett.122.247002

Provided by
California University – Riverside

References :
The new material shows a high potential for quantum computation (2019, June 28)
restored on 28 June 2019
by https://phys.org/news/2019-06-material-high-potential-quantum.html

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