Abstract
The idea of potentially infinite metrics on space-time was given by Bennett Chow and Sun-Chin Chu in 1995. After that Perelman introduced two new ideas about such metric in 2002. In this article, we use this idea in space-time warped product manifold and study gradient Ricci soliton space-time warped product. First, we introduce the notion of space-time warped product, \(P=(B\times I)\times _f F\) with potentially infinite metric, \({\mathcal {G}}=(g_B+(R+\frac{N}{2t} )\textrm{d}t^2)+f^2g_F.\) Then, we investigate the behavior of Ricci curvature tensor up to \(O(N^{-1})\) and discuss potentially gradient Ricci soliton for space-time warped product. Next, we prove existence conditions for gradient Ricci soliton space-time warped product. Then, we discuss several results for shrinking, steady, or expanding gradient Ricci soliton \((P,{\mathcal {G}},\nabla \phi , \lambda ),\) with compact base and fiber with at least dimension two. After that, we emphasize the construction of class of expanding Ricci soliton. Furthermore, we discuss the compactness of space-time manifold when space-time warped product satisfies some inequality. We also give examples of generalized black holes, which metric can be written as space-time warped product with potentially infinite metric.
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Ram Shankar Chaudhary is supported by UGC JRF of India, Ref. No: 1070/(CSIR-UGC NET DEC. 2018).
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Pal, B., Chaudhary, R.S. On gradient Ricci soliton space-time warped product with potentially infinite metric. Indian J Phys 98, 1873–1891 (2024). https://doi.org/10.1007/s12648-023-02932-4
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DOI: https://doi.org/10.1007/s12648-023-02932-4