Bose Polaron in a One-Dimensional Lattice with Power-Law Hopping

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Domínguez-Castro, G.A.: Bose Polaron in a One-Dimensional Lattice with Power-Law Hopping. In: Atoms 11 (2023), Nr. 8, 110. DOI: https://doi.org/10.3390/atoms11080110

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Abstract: 
Polarons, quasiparticles resulting from the interaction between an impurity and the collective excitations of a medium, play a fundamental role in physics, mainly because they represent an essential building block for understanding more complex many-body phenomena. In this manuscript, we study the spectral properties of a single impurity mixed with identical bosons in a one-dimensional lattice with power-law hopping. In particular, based on the so-called T-matrix approximation, we show the existence of well-defined quasiparticle branches for several tunneling ranges and for both repulsive and attractive impurity-boson interactions. Furthermore, we demonstrate the persistence of the attractive polaron branch when the impurity-boson bound state is absorbed into the two-body continuum and that the attractive polaron becomes more robust as the range of the hopping increases. The results discussed here are relevant for the understanding of the equilibrium properties of quantum systems with power-law interactions.
License of this version: CC BY 4.0 Unported
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2023
Appears in Collections:Fakultät für Mathematik und Physik

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pos. country downloads
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1 image of flag of Germany Germany 6 35.29%
2 image of flag of United States United States 5 29.41%
3 image of flag of No geo information available No geo information available 1 5.88%
4 image of flag of Indonesia Indonesia 1 5.88%
5 image of flag of United Kingdom United Kingdom 1 5.88%
6 image of flag of Europe Europe 1 5.88%
7 image of flag of Colombia Colombia 1 5.88%
8 image of flag of China China 1 5.88%

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