Non-reciprocal interactions between condensates in chemically active mixtures
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866911292617392128 |
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| author | Romano, Jacopo Johnsrud, Martin Kjøllesdal Mahault, Benoît Golestanian, Ramin |
| author_facet | Romano, Jacopo Johnsrud, Martin Kjøllesdal Mahault, Benoît Golestanian, Ramin |
| contents | We study the behaviour of catalytically active droplets in multi-component conserved mixtures affected by noise. Working in the thin interface limit, we analytically determine the state diagram of the system, characterized by multiple dynamical regimes, and verify our findings using numerical simulations. In particular, we show the emergence of a non-reciprocal, chemically-mediated interaction between the droplets, which leads to the formation of (meta-)stable clusters of droplets of different species. We find that the clusters can display self-propulsion in a large part of the parameter space, including regions where the non-reciprocal interactions between the droplets are purely attractive. This surprising feature arises from the non-local nature of the chemical interactions, and points to locality violations as a general mechanism for energy dissipation and emergence of out-of-equilibrium steady states in active matter. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_23425 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Non-reciprocal interactions between condensates in chemically active mixtures Romano, Jacopo Johnsrud, Martin Kjøllesdal Mahault, Benoît Golestanian, Ramin Soft Condensed Matter Statistical Mechanics Biological Physics Chemical Physics We study the behaviour of catalytically active droplets in multi-component conserved mixtures affected by noise. Working in the thin interface limit, we analytically determine the state diagram of the system, characterized by multiple dynamical regimes, and verify our findings using numerical simulations. In particular, we show the emergence of a non-reciprocal, chemically-mediated interaction between the droplets, which leads to the formation of (meta-)stable clusters of droplets of different species. We find that the clusters can display self-propulsion in a large part of the parameter space, including regions where the non-reciprocal interactions between the droplets are purely attractive. This surprising feature arises from the non-local nature of the chemical interactions, and points to locality violations as a general mechanism for energy dissipation and emergence of out-of-equilibrium steady states in active matter. |
| title | Non-reciprocal interactions between condensates in chemically active mixtures |
| topic | Soft Condensed Matter Statistical Mechanics Biological Physics Chemical Physics |
| url | https://arxiv.org/abs/2511.23425 |