Many-Body Quantum Dynamics of a Bosonic Josephson Junction with a Finite-Range Interaction

Sudip Kumar Haldar, Ofir E. Alon

Research output: Contribution to journalArticlepeer-review


The out-of-equilibrium quantum dynamics of a Bose gas trapped in an asymmetric double well and interacting with a finite-range interaction has been studied in real space by solving the time-dependent many-body Schrödinger equation numerically accurately using the multiconfigurational time-dependent Hartree method for bosons (MCTDHB). We have focused on the weakly interacting limit where the system is essentially condensed. We have examined the impact of the range of the interaction on the dynamics of the system, both at the mean-field and many-body levels. Explicitly, we have studied the maximal and the minimal values of the many-body position variance in each cycle of oscillation, and the overall pace of its growth. We find that the range of the interaction affects the dynamics of the system differently for the right well and the left well. We have also examined the infinite-particle limit and find that even there, the impact of the range of the interaction can only be described by a many-body theory such as MCTDHB.

Original languageEnglish
Article number012010
Number of pages11
JournalJournal of Physics: Conference Series
Issue number1
StatePublished - 17 Apr 2019
Event27th Annual International Laser Physics Workshop, LPHYS 2018 - Nottingham, United Kingdom
Duration: 16 Jul 201818 Jul 2018

Bibliographical note

Funding Information:
This research was supported by the Israel Science Foundation (Grant No. 600/15). Computation time on the High Performance Computing system Hive of the Faculty of Natural Sciences at University of Haifa is gratefully acknowledged. We also acknowledge computation time on the BwForCluster and the Cray XC40 system Hazelhen at the High Performance Computing Center Stuttgart (HLRS). SKH gratefully acknowledges the continuous hospitality at the Lewiner Institute for Theoretical Physics (LITP), Department of Physics, Technion - Israel Institute of Technology. SKH also acknowledges fruitful discussions with Anal Bhowmik.

Publisher Copyright:
© Published under licence by IOP Publishing Ltd.

ASJC Scopus subject areas

  • General Physics and Astronomy


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