Coarsening of binary Bose superfluids: an effective theory
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866911279277408256 |
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| author | Gliott, Elisabeth Piekarski, Clara Cherroret, Nicolas |
| author_facet | Gliott, Elisabeth Piekarski, Clara Cherroret, Nicolas |
| contents | We derive an effective equation of motion for binary Bose mixtures, which generalizes the Cahn-Hilliard description of classical binary fluids to superfluid systems. Within this approach, based on a microscopic Hamiltonian formulation, we show that the domain growth law $L(t)\sim t^{2/3}$ observed in superfluid mixtures is not driven by hydrodynamic flows, but arises from the competition between interactions and quantum pressure. The effective theory allows us to derive key properties of superfluid coarsening, including domain growth and Porod's laws. This provides a new theoretical framework for understanding phase separation in superfluid mixtures. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2504_12462 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Coarsening of binary Bose superfluids: an effective theory Gliott, Elisabeth Piekarski, Clara Cherroret, Nicolas Quantum Gases Quantum Physics We derive an effective equation of motion for binary Bose mixtures, which generalizes the Cahn-Hilliard description of classical binary fluids to superfluid systems. Within this approach, based on a microscopic Hamiltonian formulation, we show that the domain growth law $L(t)\sim t^{2/3}$ observed in superfluid mixtures is not driven by hydrodynamic flows, but arises from the competition between interactions and quantum pressure. The effective theory allows us to derive key properties of superfluid coarsening, including domain growth and Porod's laws. This provides a new theoretical framework for understanding phase separation in superfluid mixtures. |
| title | Coarsening of binary Bose superfluids: an effective theory |
| topic | Quantum Gases Quantum Physics |
| url | https://arxiv.org/abs/2504.12462 |