TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysCore.6.4.073
TI  - Out of equilibrium many-body expansion dynamics of strongly interacting bosons
PY  - 2023/11/03
UR  - https://scipost.org/SciPostPhysCore.6.4.073
JF  - SciPost Physics Core
JA  - SciPost Phys. Core
VL  - 6
IS  - 4
SP  - 073
A1  - Roy, Rhombik
AU  - Chakrabarti, Barnali
AU  - Gammal, Arnaldo
AB  - We solve the Schrödinger 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 Schrödinger 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.
ER  -

@Article{10.21468/SciPostPhysCore.6.4.073,
	title={{Out of equilibrium many-body expansion dynamics of strongly interacting bosons}},
	author={Rhombik Roy and Barnali Chakrabarti and Arnaldo Gammal},
	journal={SciPost Phys. Core},
	volume={6},
	pages={073},
	year={2023},
	publisher={SciPost},
	doi={10.21468/SciPostPhysCore.6.4.073},
	url={https://scipost.org/10.21468/SciPostPhysCore.6.4.073},
}