## Abstract

In this paper, we establish concentration and multiplicity properties of ground state solutions to the following perturbed double phase problem with competing potentials:

where \(1<p<q<N\), \(\Delta _{s}u=\hbox {div}(|\nabla u|^{s-2}\nabla u)\), with \(s\in \{p,q\}\), is the *s*-Laplacian operator, and \(\epsilon \) is a small positive parameter. We assume that the potentials *V*, *K* and the nonlinearity *f* are continuous but are not necessarily of class \(C^{1}\). Under some natural hypotheses, using topological and variational tools from Nehari manifold analysis and Ljusternik–Schnirelmann category theory, we study the existence of positive ground state solutions and the relation between the number of positive solutions and the topology of the set where *V* attains its global minimum and *K* attains its global maximum. Moreover, we determine two concrete sets related to the potentials *V* and *K* as the concentration positions and we describe the concentration of ground state solutions as \(\epsilon \rightarrow 0\). The asymptotic convergence and the exponential decay of positive solutions are also explored. Finally, we establish a sufficient condition for the non-existence of ground state solutions.

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## Acknowledgements

The research of Vicenţiu D. Rădulescu was supported by a grant of the Romanian Ministry of Research, Innovation and Digitization, CNCS/CCCDI-UEFISCDI, project number PCE 137/2021, within PNCDI III. The research of Jian Zhang and Wen Zhang was supported by the Natural Science Foundation of Hunan Province (2021JJ30189), the Key Project of Scientific Research Project of the Department of Education of Hunan Province (21A0387), Funding scheme for Young Backbone Teachers of universities in Hunan Province (Hunan Education Notification (2018) no. 574 and (2020) no. 43), and the China Scholarship Council (Nos. 201908430218, 201908430219) for visiting the University of Craiova (Romania). J. Zhang and W. Zhang would like to thank the China Scholarship Council and the Embassy of the People’s Republic of China in Romania.

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Zhang, J., Zhang, W. & Rădulescu, V.D. Double phase problems with competing potentials: concentration and multiplication of ground states.
*Math. Z.* **301**, 4037–4078 (2022). https://doi.org/10.1007/s00209-022-03052-1

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DOI: https://doi.org/10.1007/s00209-022-03052-1