摘要翻译：
本文研究了零温下具有排斥作用的均匀玻色气体在宽Feshbach共振附近的相图。原子的玻色-爱因斯坦凝聚(BEC)态是一种亚稳态。当散射长度$a$超过依赖于原子密度$N$，$Na3>0.035$的临界值时，分子的激发能是虚的，原子的BEC态对分子的形成是动态不稳定的。双原子分子的BEC态能量较低，原子激发为间隙，分子激发为无间隙。但当散射长度超过另一临界值$Na3>0.0164$时，分子BEC态变为原子和分子的不稳定相干混合物。在两种BEC态中，由于多体效应，双原子分子的结合能都降低了。
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英文标题：
《Phase diagram of a Bose gas near a wide Feshbach resonance》
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作者：
Lan Yin
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最新提交年份：
2008
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分类信息：

一级分类：Physics        物理学
二级分类：Other Condensed Matter        其他凝聚态物质
分类描述：Work in condensed matter that does not fit into the other cond-mat classifications
在不适合其他cond-mat分类的凝聚态物质中工作
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一级分类：Physics        物理学
二级分类：Statistical Mechanics        统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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一级分类：Physics        物理学
二级分类：Strongly Correlated Electrons        强关联电子
分类描述：Quantum magnetism, non-Fermi liquids, spin liquids, quantum criticality, charge density waves, metal-insulator transitions
量子磁学，非费米液体，自旋液体，量子临界性，电荷密度波，金属-绝缘体跃迁
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一级分类：Physics        物理学
二级分类：Superconductivity        超导电性
分类描述：Superconductivity: theory, models, experiment.  Superflow in helium
超导：理论，模型，实验。氦中超流
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英文摘要：
  In this paper, we study the phase diagram of a homogeneous Bose gas with a repulsive interaction near a wide Feshbach resonance at zero temperature. The Bose-Einstein-condensation (BEC) state of atoms is a metastable state. When the scattering length $a$ exceeds a critical value depending on the atom density $n$, $na^3>0.035$, the molecular excitation energy is imaginary and the atomic BEC state is dynamically unstable against molecule formation. The BEC state of diatomic molecules has lower energy, where the atomic excitation is gapped and the molecular excitation is gapless. However when the scattering length is above another critical value, $na^3>0.0164$, the molecular BEC state becomes a unstable coherent mixture of atoms and molecules. In both BEC states, the binding energy of diatomic molecules is reduced due to the many-body effect.
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PDF链接：
https://arxiv.org/pdf/710.5318