20.500.12556/DKUM-86147 Quantum chaos in the extended Dicke model We systematically study the chaotic signatures in a quantum many-body system consisting of an ensemble of interacting two-level atoms coupled to a single-mode bosonic field, the so-called extended Dicke model. The presence of the atom–atom interaction also leads us to explore how the atomic interaction affects the chaotic characters of the model. By analyzing the energy spectral statistics and the structure of eigenstates, we reveal the quantum signatures of chaos in the model and discuss the effect of the atomic interaction. We also investigate the dependence of the boundary of chaos extracted from both eigenvalue-based and eigenstate-based indicators on the atomic interaction. We show that the impact of the atomic interaction on the spectral statistics is stronger than on the structure of eigenstates. Qualitatively, the integrablity-to-chaos transition found in the Dicke model is amplified when the interatomic interaction in the extended Dicke model is switched on. quantum chaos extended Dicke model spectral statistics eigenstate structure kvantni kaos razširjeni Dickejev model spektralna statistika struktura lastnih stanj true false true MDPI Angleški jezik Slovenski jezik Znanstveno delo 2023-10-13 10:21:16 2023-10-13 10:28:00 2023-10-16 09:36:07 0000-00-00 00:00:00 2022 0 0 Str. 1-13 Št. 10, št. članka 1415 Letn. 24 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2022-09-15 2022-09-30 2022-10-04 530.145 141829635 10.3390/e24101415 1099-4300 Quantum_chaos_in_the_extended_Dicke_model_Wang_2022.pdf Quantum_chaos_in_the_extended_Dicke_model_Wang_2022.pdf 1 7C433335B6BB4B0392466F0B1E000A5D 06af95d7198d76a6044441fed76e9e91cff4596a621ca2a5dea89f42e10a71f4 c0afed39-69a4-11ee-b6cb-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=173546 https://doi.org/10.3390/e24101415 1 7c2221b8-69a1-11ee-b6cb-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=173544 Univerza v Mariboru 0 0 0