磁荷对Hayward-Anti-de Sitter黑洞的全息互信息的影响  

Effect of magnetic charges on holographic mutual information of Hayward-Anti-de Sitter black holes

作　　者：李慧玲[1] 张宁 张宝琪 李瑶[1] LI Huiling;ZHANG Ning;ZHANG Baoqi;LI Yao(College of Physical Science and Technology,Shenyang Normal University,Shenyang 110034,China)

机构地区：[1]沈阳师范大学物理科学与技术学院,沈阳110034

出　　处：《沈阳师范大学学报（自然科学版）》2023年第6期568-571,共4页Journal of Shenyang Normal University:Natural Science Edition

基　　金：辽宁省教育厅科学研究经费项目(LJKM20221474)。

摘　　要：Hayward黑洞是爱因斯坦引力非线性耦合一个携带磁荷的电磁场的解析解,是非线性磁单极子引力场的简并结构。一般情况下,黑洞的内部会存在奇点,而“非奇异”黑洞是一种内部没有奇点的黑洞。Hayward黑洞属于非奇异黑洞,此规则黑洞的对称性由磁势决定,带磁荷和不带磁荷的黑洞具有不同的微观结构。利用纠缠熵讨论磁荷对非奇异Hayward-Anti-de Sitter黑洞中全息互信息的影响。结果表明,随着条带宽度(子区域)的增加,2个渐进子系统纠缠增大,且全息互信息随磁荷的增加而降低。除此之外,存在临界磁荷使得全息互信息为零,此时对偶的子区域之间不存在纠缠,磁荷取不同值时,全息互信息消失的条带宽度临界值是不同的。Hayward black hole is an analytical solution of Einstein s gravitational nonlinear coupling of an electromagnetic field carrying magnetic charges.In general,there will be singularities inside black holes,and"non-singular"black holes are black holes without internal singularities,and Hayward black holes are non-singular.Hayward black hole is a degenerate structure of the nonlinear magnetic monopole gravitational field.The symmetry of the regular black hole is determined by the magnetic potential,and the magnetic charge and the non-magnetic charge have different microstructures.We discuss the influence of magnetic charge on holographic mutual information in nonsingular Hayward-Anti-de Sitter black hole by using entanglement entropy.The results show that the entanglement of the two asymptotic subsystems increases with the increase of the strip width(subregion),and the holographic mutual information decreases with the increase of magnetic charge,In addition,there is a critical magnetic charge that makes the holographic mutual information zero,and there is no entanglement between the subregions of the duality,and when the magnetic charge takes different values,the critical value of the stripe width of the holographic mutual information disappearing is different.

关 键 词：全息互信息 纠缠熵 磁荷 AdS黑洞 

分 类 号：P145.8[天文地球—天体物理]