发表机构
Georg-August-Universität Göttingen（哥廷根大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究提出在二维金属与稀薄玻色气体耦合系统中，通过调节相互作用使玻色子密度涨落长程化，从而参数化增强超导温度，并指出玻色气体密度为关键瓶颈。
AI 中文摘要
我们将金属与未凝聚的玻色气体耦合，在二维空间中引入排斥性玻色-费米相互作用。在随机相位近似下，我们证明玻色子的密度涨落（介导有效的费米-费米吸引）在适当调节相互作用时会变得长程。这导致超导温度参数化增强，$T_c \propto g$，与BCS情况下的$T_c \propto \exp(-1/g)$形成对比。稀薄玻色气体密度是增强的主要瓶颈。我们讨论了在电子-激子混合物中实施这一想法的概念性困难。
英文摘要
We couple a metal to an uncondensed bose gas with repulsive bose-fermi interactions in two dimensions. Within the random phase approximation, we show that the density fluctuations of the bosons, which mediate the effective fermion-fermion attraction, become long ranged on appropriate tuning of interactions. This leads to parametrically enhanced superconducting temperatures $T_c \propto g$ as opposed to $T_c \propto \exp(-1/g)$ for the BCS case. The dilute bose gas density acts as the primary bottleneck to the enhancement. We discuss the conceptual difficulties of implementing this idea in electron-exciton mixtures.
