From integrability to chaos: the quantum-classical correspondence in a triple well bosonic model

• URL: http://arxiv.org/abs/2311.13189v2
• Date: Thu, 4 Apr 2024 01:46:51 GMT
• Title: From integrability to chaos: the quantum-classical correspondence in a triple well bosonic model
• Authors: Erick R. Castro, Karin Wittmann W., Jorge Chávez-Carlos, Itzhak Roditi, Angela Foerster, Jorge G. Hirsch,
• Abstract summary: We investigate the semiclassical limit of a bosonic quantum many-body system exhibiting both integrable and chaotic behavior. The transition from regularity to chaos in classical dynamics is visualized through Poincar'e sections. The study systematically establishes quantum-classical correspondence for a bosonic many-body system with more than two wells.
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• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: In this work, we investigate the semiclassical limit of a simple bosonic quantum many-body system exhibiting both integrable and chaotic behavior. A classical Hamiltonian is derived using coherent states. The transition from regularity to chaos in classical dynamics is visualized through Poincar\'e sections. Classical trajectories in phase space closely resemble the projections of the Husimi functions of eigenstates with similar energy, even in chaotic cases. It is demonstrated that this correlation is more evident when projecting the eigenstates onto the Fock states. The analysis is carried out at a critical energy where the eigenstates are maximally delocalized in the Fock basis. Despite the imperfect delocalization, its influence is present in the classical and quantum properties under investigation. The study systematically establishes quantum-classical correspondence for a bosonic many-body system with more than two wells, even within the chaotic region.

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