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arXiv 0909.1719nucl-thcond-mat.othercond-mat.quant-gas
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冷α物质的饱和度和凝结分数减少

Saturation and Condensate Fraction Reduction of Cold Alpha Matter

Serban Misicu, Florin Carstoiu

摘要:

在玻色量子液体变分理论的框架下,分析了理想α-物质在T=0时的基态能量.计算了三个局部α-α势,其正体积积分和两体关联函数由Pandharipande-Bethe方程得到.在四体图的集群扩展形式主义,并使用玻色液体的HNC/0和HNC/4近似的$\alp$物质的每个粒子的能量进行评估。包含在集群扩展的冷凝分数的高阶项导致更强的耗尽的α冷凝物的密度相比,两体近似预测。

英文摘要:

The ground state energy of ideal alpha-matter at T=0 is analyzed within the framework of variational theory of Bose quantum liquids. Calculations are done for three local alpha-alpha potentials with positive volume integrals and two-body correlation functions obtained from the Pandharipande-Bethe equation. The energy per particle of $\alp$ matter is evaluated in the cluster expansion formalism up to four-body diagrams, and using the HNC/0 and HNC/4 approximation for a Bose liquid. Inclusion of higher order terms in the cluster expansion of the condensate fraction are leading to a stronger depletion of the alpha condensate with the density compared to the two-body approximation prediction.

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