Probing Quantum Phase Transitions in the sdg Interacting Boson Model Using Von Neumann Entropy
M. GhapanvariPlasma and Nuclear Fusion Research School Nuclear Science and Technology Research Institute Tehranmasoud sayediDepartment of Physics Faculty of Science Ilam University Ilam 69315-516,N. AmiriDepartment of Physics University of Tabriz Tabriz 51664M. A. JafarizadehDepartment of Theoretical Physics and Astrophysics University of Tabriz Tabriz 51664
Chinese Physics Cjournal2026
ABI
Abstract
Abstract In this work, the von Neumann entropy has been calculated and employed as a probe to analyse quantum phase transitions (QPTs) within the sdg-interacting boson model (sdg-IBM). The von Neumann entropy between the s-boson and the dg-boson sectors is used as an indicator of the QPTs and as a robust observable in the theoretical analysis of the 108−11648 Cd isotopes. The von Neumann entropy correctly characterises the QPT in the Ud (5) ⊗ Ug (9) ↔ SOsdg (15) transition region. The numerical results showed that the 10844 Cd and 11648 Cd isotopes are in Ud (5) ⊗ Ug and SOsdg(15) limits, respectively.
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