Research press release


Nature Physics

Physics: Neutrinos aid search for quantum gravity effects

時空の構造を、ニュートリノを用いて調べた結果について報告する論文が、Nature Physics に掲載される。IceCubeコラボレーションが今回明らかにした研究結果から、量子力学の原理を用いた重力の記述を目標とする量子重力理論に関する洞察が可能になるかもしれない。



関連するNews & ViewsではG Gubitosiが、「IceCubeコラボレーションが達成した目覚ましい感度は、天体物理学的ニュートリノを用いた量子重力の現象論の進展における節目を印している」と結論付けている。

The structure of space–time is investigated using neutrinos, as presented in a paper published in Nature Physics. The findings, revealed by the IceCube Collaboration, may enable insights into the theory of quantum gravity, which aims to describe gravity using the principles of quantum mechanics.

Neutrinos from far-away astrophysical sources, such as blazars, travel almost unperturbed to Earth. On their journey through the Universe, neutrinos might pass through regions whose structure deviates from our understanding of space–time. A possible cause for such changes in space–time is quantum gravity, which could leave imprints in the features of neutrinos.

The IceCube Collaboration, with its detector located in the depths of the Antarctic Ice Sheet, used astrophysical neutrinos to search for changes in the structure of space–time. The team analysed more than seven years of data, finding no signs of a modified structure of space–time imprinted in the features of the neutrinos. Their results provide insights into models that could lead to such modifications in a region where quantum gravity is expected to play a role.

In an accompanying News & Views, Giulia Gubitosi concludes that the “impressive sensitivity reached by the IceCube Collaboration marks a milestone in the development of quantum gravity phenomenology with astrophysical neutrinos.”

doi: 10.1038/s41567-022-01762-1


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