Intertwined quantum phase transitions in the even-even 90−100Sr isotopes
Abstract
The even-even 90−100Sr isotopes are identified as a region of intertwined quantum phase transitions (IQPTs). In this scenario, a quantum phase transition involving the crossing of normal and intruder configurations is accompanied by a shape evolution within the intruder configuration. Using the interacting boson model with configuration mixing (IBM-CM), its is shown that the strontium chain exhibits the IQPT scenario, where the intruder configuration evolves from a near-spherical structure in 90−−96Sr to a deformed one in 98,100Sr, while the normal and intruder configurations cross between 96Sr and 98Sr. As a result, the ground state changes abruptly from a weakly collective normal configuration to a deformed intruder configuration. Evidence for this scenario is provided by a detailed comparison with experimental excitation energies, isotope shifts, and monopole E0 transition strengths, together with the configuration and nd decompositions of the calculated wave functions. The results place the strontium isotopes alongside the neighboring zirconium chain as a realization of IQPTs in the intricate A≈100 region.
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BibTeX
@misc{gavrielov2026intertwined,
title = {{Intertwined quantum phase transitions in the even-even $^90-100$Sr isotopes}},
author = {Noam Gavrielov},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2605.23352},
eprint = {2605.23352},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2605.23352},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Intertwined quantum phase transitions in the even-even ^90−100Sr isotopes
AU - Noam Gavrielov
PY - 2026
DA - 2026/09/24
PB - arXiv
DO - 10.48550/arxiv.2605.23352
UR - https://arxiv.org/abs/2605.23352
AB - The even-even ^90−100Sr isotopes are identified as a region of intertwined quantum phase transitions (IQPTs). In this scenario, a quantum phase transition involving the crossing of normal and intruder configurations is accompanied by a shape evolution within the intruder configuration. Using the interacting boson model with configuration mixing (IBM-CM), its is shown that the strontium chain exhibits the IQPT scenario, where the intruder configuration evolves from a near-spherical structure in ^90−−96Sr to a deformed one in ^98,100Sr, while the normal and intruder configurations cross between ^96Sr and ^98Sr. As a result, the ground state changes abruptly from a weakly collective normal configuration to a deformed intruder configuration. Evidence for this scenario is provided by a detailed comparison with experimental excitation energies, isotope shifts, and monopole E0 transition strengths, together with the configuration and n_d decompositions of the calculated wave functions. The results place the strontium isotopes alongside the neighboring zirconium chain as a realization of IQPTs in the intricate A≈100 region.
ER -