Coherent Destruction of Tunneling of Dipolar Bosonic Gas

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2014,（1）
• 页码范围: 14-17
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/31/1/010303

摘要

The tunneling dynamics of a dipolar bosonic gas with repulsive interactions in a periodically driven triplewell are investigated.Because of the coupled effect of long-range dipole-dipole interaction and the short-range of on-site interaction,the increase of the repulsive atomic interactions can either suppress tunneling or enhance tunneling and,thus,the system experiences rich coherent tunneling(CT)-coherent destruction of tunneling (CDT) transitions.In particular,as the repulsive atomic interactions increase,the system can undergo CT-CDT-CT-CDT or CDT-CT-CDT-CT-CDT transitions.This cannot occur in non-dipolar gas,where the increase of the repulsive atomic interaction only suppress tunneling and the system can only undergo CT-CDT transition.We further present a good understanding of the results with the help of the quasi-energy spectrum of the system.