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."
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