红外, 2009, 30 (2): 41, 网络出版: 2010-05-26
7Li原子在光学晶格中Mott相的激发谱
Excitation Spectra of Mott-insulator Phases of 7Li Atoms in an Optical Lattice
玻色–爱因斯坦凝聚 光学晶格 超流相 Mott绝缘相 Bose-Einstein condensation optical lattice superfluid phase Mott-insulator phase
摘要
在考虑三体排斥相互作用的前提下，本文讨论了加载在光学晶格中具有两体吸 引相互作用的7Li原子Mott相的准粒子和准空穴的激发，并得出：随着三体排斥相互作用的增加，准粒子 的激发能会增加，准空穴的激发能会减小。对于低填充粒子数，准空穴激发能减小得不明显，随着填充粒子数的 增加，准空穴激发能会明显减小。
Abstract
In this paper, the excitation spectra of quasiparticles and quasiholes in Mott-insulator phase of 7Li atoms which have an attractive two-body interaction in an optical lattice are discussed when the repulsive three-body interaction is considered. It is concluded that with the increase of the repulsive three-body interaction, the energy of quasiparticles is increased and the energy of quasiholes is decreased. For a low filling factor of atoms, the energy of quasiholes is decreased slightly. With the increase of the filling factor of atoms, the energy of quasiholes is decreased remarkably.
侯利洁, 张永梅. 7Li原子在光学晶格中Mott相的激发谱[J]. 红外, 2009, 30(2): 41. HOU Li-jie, ZHANG Yong-mei. Excitation Spectra of Mott-insulator Phases of 7Li Atoms in an Optical Lattice[J]. INFRARED, 2009, 30(2): 41.
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