The quantum coherence of disordered dipolar bosonic gas

We investigate the coherence of correlated dipolar gas in the presence of disorder within a three-site Bose-Hubbard model. We show that the interplay between the on-site interaction, the inter-site dipole-dipole interactions (DDI) and the disorder exhibits new and interesting coherence characters th...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. B, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2013-05, Vol.46 (9), p.95301-1-6
Main Authors: Wang, Ji-Guo, Zhang, Ai-Xia, Tang, Rong-An, Gao, Ji-Min, Xue, Ju-Kui
Format: Article
Language:English
Subjects:
Boson systems
Cleaning
Coherence
Compressibility
Correlation
disorder
Disorders
Energy gap
Exact sciences and technology
Phase coherence
Physics
Quantum statistical mechanics
Statistical physics, thermodynamics, and nonlinear dynamical systems
ultracold dipolar gas
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We investigate the coherence of correlated dipolar gas in the presence of disorder within a three-site Bose-Hubbard model. We show that the interplay between the on-site interaction, the inter-site dipole-dipole interactions (DDI) and the disorder exhibits new and interesting coherence characters that cannot take place in a non-dipolar system. The ratio between the on-site interaction and DDI plays a dominant role in the phase coherence. The resonance character of the coherence against both disorder and interactions emerges. DDI can enhance the coherence at certain values of the disorder and on-site interaction. In the coherence region, the enhancement of the coherence by disorder in a dipolar system is more significant than that in a non-dipolar system. In particular, the on-site interaction and DDI together can enhance the coherence even in the clean dipolar system (i.e. a dipolar system without disorder). However, without the on-site interaction, disorder, DDI or both together suppress the coherence. Furthermore, the relationship between the coherence and the energy gap and the compressibility of the system is also discussed.
ISSN:0953-4075
1361-6455
DOI:10.1088/0953-4075/46/9/095301