Ab initio Gamow in-medium similarity renormalization group with resonance and continuum

Abstract

We have developed a novel ab initio Gamow in-medium similarity renormalization group (Gamow IMSRG) in the complex-energy Berggren framework. The advanced Gamow IMSRG is capable of describing the resonance and nonresonant continuum properties of weakly bound and unbound nuclear many-body systems. As test grounds, carbon and oxygen isotopes have been calculated with chiral two- and three-nucleon forces from the effective field theory. Resonant states observed in the neutron-dripline 24O are well reproduced. The halo structure of the known heaviest Borromean nucleus 22C is clearly seen by calculating the density distribution in which the continuum s channel plays a crucial role. Furthermore, we predict low-lying resonant excited states in 22C. The Gamow IMSRG provides tractable ab initio calculations of weakly bound and unbound open quantum systems.

arXiv admin note: text overlap with arXiv:1809.08405

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Cited by in corpus (14)

• Two-proton emission and related phenomena
• An {\it ab-initio} Gamow shell model approach with a core
• Unbound spectra of neutron-rich oxygen isotopes predicted by the Gamow shell model
• Chiral three-nucleon force and continuum for dripline nuclei and beyond
• Description of proton-rich nuclei in the $A\sim 20$ region with the Gamow shell model
• Continuum and three-nucleon force in Borromean system: The 17Ne case
• Deformed in-medium similarity renormalization group
• Double-magicity of proton drip-line nucleus ${}^{22}$Si with \textit{ab initio} calculation
• Recent progress in configuration-interaction shell model
• Ab initio descriptions of $A=16$ mirror nuclei with resonance and continuum coupling
• Complex valence-space effective operators for observables: the Gamow-Teller transition
• Role of quadrupole deformation and continuum effects in the "island of inversion'' nuclei ${}^{28,29,31}$F
• Ab initio calculations of anomalous seniority breaking in the $\pi g_{9/2}$ shell for the $N=50$ isotones
• Coupled-cluster computations of optical potential for medium-mass nuclei