Experimental evidence for strong emergent correlations between particles in a switching trap
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arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866908483830415360 |
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| author | Biroli, Marco Ciliberto, Sergio Kulkarni, Manas Majumdar, Satya N. Petrosyan, Artyom Schehr, Gregory |
| author_facet | Biroli, Marco Ciliberto, Sergio Kulkarni, Manas Majumdar, Satya N. Petrosyan, Artyom Schehr, Gregory |
| contents | We experimentally study a gas of $N = 8$ one-dimensional Brownian particles, each confined in a harmonic trap with identical stiffness. The stiffness switches simultaneously between two values at random Poissonian times. This collective switching drives the system into a non-equilibrium stationary state (NESS) with strong long-range correlations between the positions of the particles. Remarkably, we find that these switching-induced emergent correlations completely overwhelm the hydrodynamic interactions between the particles mediated via the surrounding fluid. Comparing with exact theoretical predictions for noninteracting particles, we observe excellent agreement between theory and experiments for multiple observables, including the correlations between particles, extreme value and order statistics (maxima, minima and ranked positions) and the full counting statistics (i.e., the distribution of the number of particles in a finite interval $[-L, L]$ around the trap center). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_07199 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Experimental evidence for strong emergent correlations between particles in a switching trap Biroli, Marco Ciliberto, Sergio Kulkarni, Manas Majumdar, Satya N. Petrosyan, Artyom Schehr, Gregory Statistical Mechanics Soft Condensed Matter We experimentally study a gas of $N = 8$ one-dimensional Brownian particles, each confined in a harmonic trap with identical stiffness. The stiffness switches simultaneously between two values at random Poissonian times. This collective switching drives the system into a non-equilibrium stationary state (NESS) with strong long-range correlations between the positions of the particles. Remarkably, we find that these switching-induced emergent correlations completely overwhelm the hydrodynamic interactions between the particles mediated via the surrounding fluid. Comparing with exact theoretical predictions for noninteracting particles, we observe excellent agreement between theory and experiments for multiple observables, including the correlations between particles, extreme value and order statistics (maxima, minima and ranked positions) and the full counting statistics (i.e., the distribution of the number of particles in a finite interval $[-L, L]$ around the trap center). |
| title | Experimental evidence for strong emergent correlations between particles in a switching trap |
| topic | Statistical Mechanics Soft Condensed Matter |
| url | https://arxiv.org/abs/2508.07199 |