Work

Many-Body Effects in a Composite Bosonic Josephson Junction

Year: 2024

Type: article

Abstract: In standard BJJs, particles tunnel between two single-well potentials linked by a finite barrier. The dynamics of standard BJJs have been extensively studied, both at the many-body and mean-field levels of theory. In the present work, we introduce the concept of a composite BJJ. In a composite BJJ, particles tunnel between two double-well potentials linked by a finite potential barrier between them. We focus on many-body facets of quantum dynamics and investigate how the complex structure of the junction influences tunnelling. Employing the multiconfigurational time-dependent Hartree for bosons method, highly-accurate many-boson wave-functions are obtained from which properties are computed. We analyze the dynamics using the survival probability, the degree of fragmentation, and the fluctuations of observables, and discuss how many-boson tunnelling behaves, and how it may be controlled. We also provide strong evidence that a universal degree of fragmentation into multiple time-dependent modes takes place. Further applications are briefly discussed.

Source: Atoms

DOI: 10.3390/atoms12120066

Authors: Sudip Kumar Haldar, Anal Bhowmik, Ofir E. Alon

Institutions: Jaypee Institute of Information Technology, SRM University, University of Haifa

Language: English

Topic: Cold Atom Physics and Bose-Einstein Condensates

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,705

Funders: Department of Science and Technology, Ministry of Science and Technology, India, University of Haifa