49 citations · 70 across the 5 of their papers we have counts for
6 papers
Introduction of the one-body correlation operator in the unitary-model-operator approach
Takayuki Miyagi, Takashi Abe, Ryoji Okamoto +1
In the earlier unitary-model-operator approach (UMOA), one-body correlations have been taken into account approximately by the diagonalization of unitary-transformed Hamiltonians i…
Large-scale shell-model analysis of the neutrinoless decay of Ca
Y. Iwata, N. Shimizu, T. Otsuka +4
We present the nuclear matrix element for the neutrinoless double-beta decay of Ca based on large-scale shell-model calculations including two harmonic oscillator shells ($s…
Ground-state energies and charge radii of He, O, Ca, and Ni in the unitary-model-operator approach
Takayuki Miyagi, Takashi Abe, Ryoji Okamoto +1
We study the nuclear ground-state properties by using the unitary-model-operator approach (UMOA). Recently, the particle-basis formalism has been introduced in the UMOA and enables…
New Generation of the Monte Carlo Shell Model for the K Computer Era
Noritaka Shimizu, Takashi Abe, Yusuke Tsunoda +5
We present a newly enhanced version of the Monte Carlo Shell Model method by incorporating the conjugate gradient method and energy-variance extrapolation. This new method enables…
Benchmark calculation of no-core Monte Carlo shell model in light nuclei
T. Abe, P. Maris, T. Otsuka +3
The Monte Carlo shell model is firstly applied to the calculation of the no-core shell model in light nuclei. The results are compared with those of the full configuration interact…
Novel Extrapolation Method in the Monte Carlo Shell Model
Noritaka Shimizu, Yutaka Utsuno, Takahiro Mizusaki +3
We propose an extrapolation method utilizing energy variance in the Monte Carlo shell model in order to estimate the energy eigenvalue and observables accurately. We derive a formu…