'Forbidden' light in superconductors heralds new quantum frontier: Page 2 of 2

May 21, 2020 //By Rich Pell
'Forbidden' light in superconductors heralds new quantum frontier
Scientists at Iowa State University say they are using light waves to accelerate supercurrents - electricity that moves through materials without resistance, usually at super cold temperatures - giving researchers access to a new class of quantum phenomena.
valves over half a century ago," says Perakis, "scientists are searching for a leap forward in design principles and novel devices in order to achieve quantum computing and communication capabilities. Finding ways to control, access and manipulate the special characteristics of the quantum world and connect them to real-world problems is a major scientific push these days. The National Science Foundation has included quantum studies in its ' 10 Big Ideas ' for future research and development critical to our nation."

Wang adds, "The determination and understanding of symmetry breaking in superconducting states is a new frontier in both fundamental quantum matter discovery and practical quantum information science. Second harmonic generation is a fundamental symmetry probe. This will be useful in the development of future quantum computing strategies and electronics with high speeds and low energy consumption."

To achieve this, say the researchers, they need to do more exploring of the quantum world. And, says Wang, this forbidden second harmonic light emission in superconductors represents "a fundamental discovery of quantum matter."

For more, see " Terahertz Second-Harmonic Generation from Lightwave Acceleration of Symmetry-Breaking Nonlinear Supercurrents ."

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