Holographic superconductors with four-order derivative correction

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摘要:

构建了一个4阶导数引力框架下的全息超导体模型.主要研究了凝聚态形成,临界温度T_c及超导能隙ω_g/T_c的变化规律.研究结果表明,高斯-博内(Gauss-Bonnet,GB)耦合阻碍凝聚的形成,促使超导能隙变大;而外尔耦合项可以使得超导能隙从接近BCS理论的ω_g/T_c≈3.5到大于标准全息超导的ω_g/T_c≈8变化.4阶导数引力框架下的全息超导体模型给出了更丰富的物理图像,有助于研究全息对偶系统.

In this paper,a holographic superconductor model under four-order derivative gravity frame is constructed.We mainly study the variation of condensation,critical temperature and superconducting energy gap with the coupling parameters.The results show that the GB coupling hinders the formation of condensation,which causes the superconducting energy gap to become larger,and the Weyl coupling term drives the superconducting energy gap changing from the value of approaching 3.5 to the one beyond the standard holographic superconductor.The holographic superconductor model from the four-order derivative gravitational frame can help us to study a large class of holographic dual systems,which provides a richer phenomenon.

作者:

吴健聘徐百成付国杨

Wu Jianpin;Xu Baicheng;Fu Guoyang(Bohai University School of Mathematics and Physics,Liaoning Jinzhou 121013,China)

机构地区:

渤海大学数理学院

出处:

《betway官方app 学报：自然科学版》 CAS 北大核心 2018年第4期29-34,共6页

基金:

国家自然科学基金(11705161) 辽宁省自然科学基金(201602013)

关键词:

AdS/CFT对偶 GB引力黑洞外尔修正

AdS/CFT duality GB gravity black hole Weyl correction