论文标题
新的常规2+1个黑洞溶液来自双腹重力
New regular 2+1 black hole solutions from bilocal gravity
论文作者
论文摘要
我们获得了新的常规黑洞溶液,用于在2+1个维度中具有双尾ricci标量和负宇宙常数的作用。除了与宇宙常数的联系外,这些解决方案还取决于其非本地性质的基本长度。非本地几何形状产生的有效曲线密度具有准定位的质量/能量,因为它们在原点是有限的,并且它们在所有空间中的整合都是收敛的。获得的黑洞不含奇异性,并根据所涉及参数的值呈现一个,二或没有地平线。新的解决方案可以具有广告,DS甚至平坦的核心。对于De-sitter核心,它可以代表来自量子效应的排斥力。尽管产生的(有效的)宇宙常数在起源附近是正,但经典(裸)的对应物仍然为负,因此排除了宇宙学的视野。我们研究有效来源的能量条件,并确定应找到外来能量的区域。还计算了热力学量。一方面,吉布斯的潜力表明,这两种解决方案在全球范围内都不稳定,如BTZ情况。另一方面,我们表明,对于高尺度的小值,鹰温度有负分歧,但可以在$ t_h $交叉零的位置定义有限的尺寸残余。在这一点上,热容量标志从阴性变为正变为阳性,表明黑洞在照射时是局部稳定的。因此,这样的数量以及$ t_h $,与BTZ黑洞有关小型地平线的btz黑洞存在至关重要的差异,其中量子效应变得相关。最后,我们分析了双向黑洞的大地测量学,并找到了无质量和巨大颗粒的稳定圆形轨道,这是BTZ情况下不存在的另一个特征。
We obtain new regular black hole solutions for an action in 2+1 dimensions with bilocal Ricci scalar and negative cosmological constant. Besides their connection to the cosmological constant, these solutions depend on a fundamental length due to their non-local nature. The effective profile densities that result from the non-local geometries have quasi-localized mass/energy since they are finite at the origin and their integration in all space is convergent. The black holes obtained are free of singularities and present one, two, or none horizons depending on the values of the involved parameters. The new solutions can have either an AdS, dS, or even a flat core. In the case of a de-Sitter core, it could represent a repulsive force coming from quantum effects. Although the resulting (effective) cosmological constant is positive near the origin, the classical (naked) counterpart is still negative thus precluding a cosmological horizon. We investigate the energy conditions of the effective source and determine the region where exotic energy should be found. Thermodynamic quantities are also computed. On the one hand, Gibbs's potential shows that both solutions are globally unstable, as in the BTZ case. On the other, we show that for small values of the horizon radius the Hawking temperature is negatively divergent but a finite size remnant can be defined where $T_H$ crosses zero. At this point, the heat capacity sign changes from negative to positive, indicating that the black holes are locally stable while irradiating. Thus, such a quantity, along with $T_H$, presents crucial differences with the BTZ black hole for small horizon radii where quantum effects become relevant. Finally, we analyze the bilocal black hole geodesics and find stable circular orbits for massless and massive particles, another feature absent in the BTZ case.