Lee-Wick black holes

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• 作者：Cosimo Bambi^a ; ^b ; ^{bambi@fudan.edu.cn} ; Leonardo Modesto^c ; ^{lmodesto@sustc.edu.cn} ; Yixu Wang^d ; ^{yw417@cam.ac.uk}
• 刊名：Physics Letters B
• 出版年：2017
• 出版时间：10 January 2017
• 年：2017
• 卷：764
• 期：Complete
• 页码：306-309
• 全文大小：266 K
• 卷排序：764

文摘

We derive and study an approximate static vacuum solution generated by a point-like source in a higher derivative gravitational theory with a pair of complex conjugate ghosts. The gravitational theory is local and characterized by a high derivative operator compatible with Lee–Wick unitarity. In particular, the tree-level two-point function only shows a pair of complex conjugate poles besides the massless spin two graviton. We show that singularity-free black holes exist when the mass of the source M   exceeds a critical value McritMcrit. For M>McritM>Mcrit the spacetime structure is characterized by an outer event horizon and an inner Cauchy horizon, while for M=McritM=Mcrit we have an extremal black hole with vanishing Hawking temperature. The evaporation process leads to a remnant that approaches the zero-temperature extremal black hole state in an infinite amount of time.