| Texto completo | |
| Autor(es): |
Roy, Rhombik
;
Chakrabarti, Barnali
;
Gammal, Arnaldo
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | SCIPOST PHYSICS CORE; v. 6, n. 4, p. 16-pg., 2023-10-01. |
| Resumo | |
We solve the Schrodinger equation from first principles to investigate the many-body effects in the expansion dynamics of one-dimensional repulsively interacting bosons released from a harmonic trap. We utilize the multiconfigurational time-dependent Hartree method for bosons (MCTDHB) to solve the many-body Schrodinger equation at high level of accuracy. The MCTDHB basis sets are explicitly time-dependent and optimised by variational principle. We probe the expansion dynamics by three key measures; time evolution of one-, two- and three-body densities. We observe when the mean-field theory results to unimodal expansion, the many-body calculation exhibits trimodal expansion dynamics. The many-body features how the initially fragmented bosons independently spreads out with time whereas the mean-field pictures the expansion of the whole cloud. We also present the three different time scale of dynamics of the inner core, outer core and the cloud as a whole. We analyze the key role played by the dynamical fragmentation during expansion. A Strong evidence of the many-body effects is presented in the dynamics of two- and three-body densities which exhibit correlation hole and pronounced delocalization effect. (AU) | |
| Processo FAPESP: | 16/17612-7 - Dinâmica de sistemas de muitos corpos IV |
| Beneficiário: | Arnaldo Gammal |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |