Ph.D., 2003 - Louisiana State University
Louisiana State University
Department of Physics & Astronomy
226 Nicholson Hall, Tower Dr.
Baton Rouge, LA 70803-4001
My main research focuses on strong interaction physics ranging from modeling atomic nuclei from first principles (or "ab initio"), through electroweak- and strong-interaction driven nuclear reactions, to further understanding the nuclear interaction from the underlying foundation of Quantum Chromodynamics (QCD). Indeed, how the strong force bonds protons and neutrons into a plethora of nuclei is still not well understood, and presents a foremost challenge. The reason is that modeling the nucleus from first principles, which holds predictive power, is a computationally intense task and faces the difficulty, first, of strong interactions that prohibit perturbative treatments and, second, of accounting for emergent phenomena. Our research addresses some of these challenges by taking advantage of symmetries that dominate the many-body nuclear dynamics, inter-nucleon interaction and its effective counterparts in nuclear medium. It targets two overarching goals:
Recent studies include: no-core symplectic shell model (NCSpM) for large deformation and alpha-cluster substructures exemplified by the challenging Hoyle state in 12C; symmetry-adapted no-core shell model (SA-NCSM) for ab initio nuclear structure with its first reach of intermediate-mass nuclei (isotopes of Ne, Mg, Al, and Si); spectral distribution theory (SDT) for effective interactions and for level densities needed as input to nuclear reactions for medium-mass nuclei above 56Ni; similarity renormalization group (SRG) for effective interactions; R-matrix coupled-channel method (CCM) for nuclear reactions, such as proton-capture reactions of importance to Ne-Na/Mg-Al chains in AGB stars and X-ray burst nucleosynthesis; electron and neutrino scattering; exact pairing of importance to density functional theory studies; quantum information applications with a focus on Shannon and von Neumann entropies of nuclear systems; group-theoretical approaches involving symplectic Sp(3,R) & Sp(2) groups and SU(3) group.