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arXiv 0808.3288cond-mat.stat-mech
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二维硬球玻色原子基态能量密度的一阶量子修正

First-order quantum correction to the ground-state energy density of two-dimensional hard-sphere Bose atoms

Sang-Hoon Kim, Mukunda P. Das

摘要:

利用有效场论方法计算了二维硬球玻色原子的一阶量子修正发散指数。基态能量密度相对于零阶的一阶修正由$\cale_1/\cale_0 \sim |D-2|^{-\al}|\lnγ|^{-\al'}$给出,其中$D$是空间维度,$γ$是气体参数($γ=n a^D$)。作为$D \to 2$、$\al =\al'=1$。我们表明,一阶量子校正的能量密度是不微扰的低维$D < 2.2$,无论任何气体参数,这是远远小于1。

英文摘要:

Divergence exponents of the first-order quantum correction of a two-dimensional hard-sphere Bose atoms are obtained by an effective field theory method. The first-order correction to the ground-state energy density with respect to the zeroth-order is given by $\cale_1/\cale_0 \sim |D-2|^{-\al}|\lnγ|^{-\al'}$, where $D$ is the spatial dimension, and $γ$ is the gas parameter ($γ=n a^D$). As $D \to 2$, $\al =\al'=1$. We show that the first-order quantum correction of the energy density is not perturbative in low dimensions of $D < 2.2$ regardless of any gas parameter which is much less that 1.

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