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10 papers · 1 filter
Microscopic analysis of quadrupole collective motion in Cr-Fe nuclei: I. Renormalization of collective states and interacting-boson-model parameters
H. Nakada, T. Otsuka
We present a new method by which wavefunctions with simple structure are renormalized so as to contain more complicated structure. This method, called -cooling method, is appl…
Doping dependent quasiparticle band structure in cuprate superconductors
R. Eder, Y. Ohta, G. A. Sawatzky
We present an exact diagonalization study of the single particle spectral function in the so-called t-t'-t''-J model in 2D. As a key result, we find that unlike the `pure' t-J mode…
Low energy excitations of the t-J model in 1D and 2D
R. Eder, Y. C. Chen, H. Q. Lin +3
We present an exact diagonalization study of the low energy singlet and triplet states for both 1D and 2D t-J model. A scan of the parameter ratio J/t shows that for nearly all low…
X-Ray Flares and Mass Outflows Driven by Magnetic Interaction between a Protostar and its Surrounding Disk
M. R. Hayashi, K. Shibata, R. Matsumoto
We propose a model of hard X-ray flares in protostars observed by ASCA satellite. Assuming that the dipole magnetic field of the protostar threads the protostellar disk, we carried…
Realistic shell model calculation of nuclear matrix elements and role of shell structure in intermediate states
H. Nakada, T. Sebe, K. Muto
We discuss two conditions needed for correct computation of nuclear matrix-elements within the realistic shell-model framework. An algorithm in which intermediate states are…
Microscopic description of Gamow-Teller transitions in middle pf--shell nuclei by a realistic shell model calculation
H. Nakada, T. Sebe
GT transitions in nuclei are studied in terms of a large-scale realistic shell-model calculation, by using Towner's microscopic parameters. values to lo…