Emergent geometry and duality in the carbon nucleus.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 37188675.
- Also identified by DOI 10.1038/s41467-023-38391-y and PMC identifier 10185503.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
The carbon atom provides the backbone for the complex organic chemistry composing the building blocks of life. The physics of the carbon nucleus in its predominant isotope, <sup>12</sup>C, is similarly full of multifaceted complexity. Here we provide a model-independent density map of the geometry of the nuclear states of <sup>12</sup>C using the ab initio framework of nuclear lattice effective field theory. We find that the well-known but enigmatic Hoyle state is composed of a "bent-arm" or obtuse triangular arrangement of alpha clusters. We identify all of the low-lying nuclear states of <sup>12</sup>C as having an intrinsic shape composed of three alpha clusters forming either an equilateral triangle or an obtuse triangle. The states with the equilateral triangle formation also have a dual description in terms of particle-hole excitations in the mean-field picture.