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Findings of Du Lingjie team named one of China's top 10 sci-tech achievements in 2024

On January 22, the Chinese Academy of Sciences (CAS) and the Chinese Academy of Engineering (CAE) announced China's/world's top 10 sci-tech achievements in 2024 in Nanjing. CAS vice-president Wu Zhaohui and CAE vice-president Wang Chen unveiled China's top ten achievements and world's top 10 achievements respectively. The lists were selected by academicians of CAS and CAE, who hold the country's highest national academic titles in science and engineering. This annual award has been held 31 times so far. The selected sci-tech achievements have been widely reported by the media and have had a strong impact on society, enabling the public to further understand the dynamics of scientific and technological development at home and abroad, and thus playing a positive role in popularizing knowledge of the frontiers of science.

Fingdings of Du Lingjie team: "Evidence for chiral graviton modes in fractional quantum Hall liquids" is named one of China's top 10 sci-tech achievements. It is the first time in the world that Chinese scientists have observed graviton modes that are condensed-matter analogues of gravitons.

In March 2024, the team of Professor Du Lingjie from the School of Physics, Nanjing University published a research paper in the journal Nature, with the title "Evidence for chiral graviton modes in fractional quantum Hall liquids." They utilized resonant inelastic scattering of circularly polarized light to study low-energy collective excitations of the fractional quantum Hall liquids in a gallium arsenide quantum well, and for the first-time observed graviton modes that are condensed-matter analogues of gravitons (hypothetical spin-2 bosons as pointed out by Fierz and Pauli in 1939). The graviton modes in fractional quantum Hall liquids manifest as chiral spin-2 long-wavelength magnetorotons. This significant discovery also has crucial importance for understanding new correlated quantum physics and for the realization of topological quantum computers.


Link to the paper: Evidence for chiral graviton modes in fractional quantum Hall liquids | Nature