Speakers
Description
We propose a multiconfiguration time-dependent Hartree–Fock (MCTDHF) method for ab initio descriptions of many-body tunneling in nuclear processes. Originally developed for intense laser-driven multielectron dynamics [1], the MCTDHF method employs a configuration interaction (CI) wavefunction in which both the CI coefficients and single-particle functions are treated as time-dependent variational parameters. This framework enables a compact and efficient representation of quantum tunneling dynamics at a reasonable computational cost. In this contribution, we review our previous work on electron dynamics [2], discuss possible different formulations of MCTDHF, and present some numerical results for the scattering of two alpha particles in one dimension [3,4].
[1] T. Kato and H. Kono, "Time-dependent multiconfiguration theory for electronic dynamics of molecules in an intense laser field", Chem. Phys Lett. 392, 533 (2004),
[2] T. Sato, H. Pathak, Y. Orimo, and K. L. Ishikawa, "Time-dependent multiconfiguration self-consistent-field and time-dependent optimized coupled-cluster methods for intense laser-driven multielectron dynamics", Can. J. Chem. 101, 698 (2023),
[3] P.-G. Reinhard, R.Y. Cusson, and K. Goeke, “Time evolution of coherent ground-state correlations and the TDHF approach”, Nucl. Phys. A 398, 141 (1983) .
[4] N. Hasegawa, K. Haginob, and Y. Tanimura, “Time-dependent generator coordinate method for many-particle tunneling”, Phys. Lett. B 808, 135693 (2020).