Tunneling across dilaton-axion black holes
Tunneling across dilaton-axion black holes
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DOI：
10.1016/j.physletb.2009.05.063
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发表时间：
2009-06
影响因子：
4.4
通讯作者：
T. Ghosh;S. Sengupta
中科院分区：
文献类型：
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作者：
T. Ghosh;S. Sengupta
在这项工作中，我们研究了带电和不带电粒子隧穿视界的球对称介子-轴子黑洞使用Parikh-Wilczek隧穿形式。这样的黑洞解在基于弦理论的模型中具有重要意义。对于不同的选择的介子和轴子与电磁场的耦合，我们表明，隧穿概率取决于初始和最终的黑洞熵之间的差异。我们的结果与其他类黑洞的类似结果一致，进一步证实了Parikh-Wilczek形式主义对理解霍金辐射的有用性。的发射光谱示出同意与一个纯粹的热光谱，只有在领先的顺序。确定了贝肯斯坦-霍金公式中面积-熵关系中比例因子的修正。
In this work we study both charged and uncharged particles tunneling across the horizon of spherically symmetric dilaton–axion black holes using Parikh–Wilczek tunneling formalism. Such black hole solutions have much significance in string theory based models. For different choices of the dilaton and axion couplings with the electromagnetic field, we show that the tunneling probability depends on the difference between initial and final entropies of the black hole. Our results, which agree with similar results obtained for other classes of black holes, further confirm the usefulness of Parikh–Wilczek formalism to understand Hawking radiation. The emission spectrum is shown to agree with a purely thermal spectrum only in the leading order. The modification of the proportionality factor in the area–entropy relation in the Bekenstein–Hawking formula has been determined.