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arXiv 0912.0099cond-mat.quant-gascond-mat.stat-mech
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格点玻色子的两步凝聚

Two-step condensation of lattice bosons

R. Ramakumar, A. N. Das

摘要:

本文从理论上研究了高各向异性简谐势阱中的玻色-爱因斯坦凝聚。玻色子被认为是在一个整体各向异性的谐波限制势的光晶格中运动。我们发现,两步凝聚发生的晶格玻色子在大大减少谐波势各向异性相比,理想玻色气体的情况下,在各向异性谐波限制。当玻色子处于各向同性谐振子禁闭中,但在光晶格中具有高度各向异性跳跃时,不发生两步凝聚。我们解释我们的一些结果,使用对应的玻色子所面临的潜在的单玻色子密度的能量状态。

英文摘要:

We present a theoretical study of Bose-Einstein condensation in highly anisotropic harmonic traps. The bosons are considered to be moving in an optical lattice in an overall anisotropic harmonic confining potential. We find that two-step condensation occurs for lattice bosons at much reduced harmonic potential anisotropy when compared to the case of an ideal bose gas in an anisotropic harmonic confinement. We also show that when the bosons are in an isotropic harmonic confinement but with highly anisotropic hopping in the optical lattice, two-step condensation does not occur. We interpret some of our results using single boson density of energy states corresponding to the potentials faced by the bosons.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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