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Quantum computer simulates superconductors

Quantum simulation
A 2,048-qubit D-Wave 2000Q processor, shown in the lower half of this image, was used to simulate the behavior of a quantum magnetic system depicted in the upper half. (D-Wave Systems Illustration)

One of the prime applications for quantum computers is to simulate natural quantum phenomena, and in a newly published study, researchers from Canada’s D-Wave Systems have demonstrated how to do it.

The phenomenon that they simulated involves a topological phase transition associated with thin-film superconductivity and superfluidity. It’s called the Kosterlitz-Thouless phase transition, and figuring out how the transition could be done earned Brown University’s Michael Kosterlitz and the University of Washington’s David Thouless shares of the 2016 Nobel Prize in physics.

Today Kosterlitz hailed the quantum computer simulation, which is described in a paper published by Nature.

“This paper represents a breakthrough in the simulation of physical systems which are otherwise essentially impossible,” Kosterlitz said in a D-Wave news release. “The test reproduces most of the expected results, which is a remarkable achievement.”

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UW’s David Thouless wins Nobel physics prize

David Thouless
UW Professor Emeritus David Thouless is one of the winners of this year’s Nobel Prize for physics. (Credit: Kiloran Howard / Trinity Hall, University of Cambridge)

David Thouless, a British-born professor emeritus at the University of Washington, has been awarded half of this year’s Nobel physics prize for untangling the topological mysteries of superconductors, superfluids and other weird materials.

“Over the last decade, this area has boosted front-line research in condensed matter physics, not least because of the hope that topological materials could be used in new generations of electronics and superconductors, or in future quantum computers,” the Royal Swedish Academy of Sciences said in today’s announcement of the award.

The other physicists named as Nobel laureates are Princeton’s Duncan Haldane and Brown University’s Michael Kosterlitz. The Nobel Prize committee allocated half of the $930,000 (8 million Swedish kronor) award to Thouless, with the other half to be shared by Haldane and Kosterlitz.

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