Magnons interaction of spinor Bose-Einstein condensates in an optical lattice |
| |
Authors: | Yong-Qing Liu |
| |
Institution: | (1) College of Physics Science and Technology, China University of Petroleum (East China), Dongying, 257061, China;(2) Department of Physics, Beijing Information Science and Technology University, Beijing, 100101, China |
| |
Abstract: | We study the interaction of magnons in dipolar spinor Bose-Einstein condensates in an optical lattice. By means of Holstein-Primakoff
and Fourier transformations the energy spectra of the ground and the excited states is obtained analytically. Our results
show that the collision of magnons is elastic which is expressed by the conservation of wave numbers in the process of collision.
At last, we found that the interaction of magnons is attractive which tends to self-localization to form spin waves, i.e.,
a cluster of a macroscopic number of coherent magnons. Because of the attraction, the instability of spin wave brings about
the existence of solitary wave. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|