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首页> 外文期刊>Physica, B. Condensed Matter >Critical temperature of a BoseEinstein condensate in a 3D non-cubic optical lattice
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Critical temperature of a BoseEinstein condensate in a 3D non-cubic optical lattice

机译：3D非立方光学晶格中BoseEinstein冷凝物的临界温度

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摘要

In this paper, The condensation fraction and the critical temperature of the harmonically trapped Bose gas in a 3D non-cubic optical lattice, T _c, are investigated. Corrections due to the finite-size and interatomic interaction are given simultaneously. More interestingly, we have found that the condensate fraction is vanishes (experimentally the Mott-insulating phase is identified by vanishing the condensed fraction) when the recoil frequency at lattice sites are less than the geometrical average of the harmonic frequencies. The critical temperature T_c is shifted to downward due to increasing the lattice depth or the relative frequency (the ratio between recoil frequency and geometrical average of the harmonic frequencies). This shift for T_c can be controlled by adjusting the harmonic frequency. Our approach provides a solid theoretical foundation for current experiments.
机译：本文研究了3D非立方光学晶格T _c中谐波俘获的玻色气体的冷凝率和临界温度。同时给出了由于有限尺寸和原子间相互作用而引起的校正。更有趣的是，我们发现当晶格位置的反冲频率小于谐波频率的几何平均值时，凝结水分数消失了（实验上，通过消除凝结水分数确定了Mott绝缘相）。由于晶格深度或相对频率（反冲频率与谐波频率的几何平均值之比）的增加，临界温度T_c向下移动。 T_c的这种偏移可以通过调整谐波频率来控制。我们的方法为当前的实验提供了坚实的理论基础。

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