Title:
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Self-bound Bose mixtures
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Author:
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Staudinger, Clemens; Mazzanti Castrillejo, Fernando Pablo; Zillich, Robert E.
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Física; Universitat Politècnica de Catalunya. SIMCON - First-principles approaches to condensed matter physics: quantum effects and complexity |
Abstract:
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Recent experiments confirmed that fluctuations beyond the mean-field approximation can lead to self-bound liquid droplets of ultradilute binary Bose mixtures. We proceed beyond the beyond-mean-field approximation and study liquid Bose mixtures by using the variational hypernetted-chain Euler–Lagrange method, which accounts for correlations nonperturbatively. Focusing on the case of a mixture of uniform density, as realized inside large saturated droplets, we study the conditions for stability against evaporation of one of the components (both chemical potentials need to be negative) and against liquid-gas phase separation (spinodal instability), the latter being accompanied by a vanishing speed of sound. Dilute Bose mixtures are stable only in a narrow range near an optimal ratio ¿1/¿2 and near the total energy minimum. Deviations from a universal dependence on the s-wave scattering lengths are significant despite the low density. |
Subject(s):
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-Àrees temàtiques de la UPC::Física -Bose-Einstein condensation -Bose gases
Quantum fluids & solids -Condensació de Bose-Einstein |
Rights:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Document type:
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Article - Submitted version Article |
Published by:
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American Physical Society (APS)
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