Article
Fate of Boltzmann’s Breathers: Stokes Hypothesis and Anomalous Thermalization
Author/s | García de Soria Lucena, María Isabel
Maynar Blanco, Pablo Guery-Odelin, David Trizac, Emmanuel |
Department | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear |
Publication Date | 2024-01-11 |
Deposit Date | 2024-02-20 |
Published in |
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Abstract | Boltzmann showed that in spite of momentum and energy redistribution through collisions, a rarefied gas confined in a isotropic harmonic trapping potential does not reach equilibrium; it evolves instead into a breathing ... Boltzmann showed that in spite of momentum and energy redistribution through collisions, a rarefied gas confined in a isotropic harmonic trapping potential does not reach equilibrium; it evolves instead into a breathing mode where density, velocity, and temperature oscillate. This counterintuitive prediction is upheld by cold atoms experiments. Yet, are the breathers eternal solutions of the dynamics even in an idealized and isolated system? We show by a combination of hydrodynamic arguments and molecular dynamics simulations that an original dissipative mechanism is at work, where the minute and often neglected bulk viscosity eventually thermalizes the system, which thus reaches equilibrium. |
Funding agencies | Junta de Andalucía Ministerio de Ciencia e Innovación (MICIN). España Agencia Estatal de Investigación. España European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER) Agence Nationale de la Recherche. France |
Project ID. | ProyExcel-00505
PID2021-126348N ANR-18-CE30-0013 |
Citation | García de Soria Lucena, M.I., Maynar Blanco, P., Guery-Odelin, D. y Trizac, E. (2024). Fate of Boltzmann’s Breathers: Stokes Hypothesis and Anomalous Thermalization. Physical Review Letters, 132 (2), 027101. https://doi.org/10.1103/PhysRevLett.132.027101. |
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