Probing scale-dependent liveliness with nonequilibrium thermospectroscopy
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866917324385157120 |
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| author | Mecke, Joscha Kroy, Klaus |
| author_facet | Mecke, Joscha Kroy, Klaus |
| contents | Probing the spatially heterogeneous activity across scales is a major challenge in living matter. Energy injection at diverse length scales leads to mode coupling, inter-modal energy transfer, and entropy production. We demonstrate the emergence of multiple effective (``active'') temperatures in nonequilibrium molecular- and Brownian-dynamics simulations of an active polymer. Via a generalised Langevin equation for a labelled monomer we identify spectral noise temperatures and their relation to the underlying activity landscape. A harmonic trap of variable stiffness can serve as a minimally invasive prototypical spectroscopic device to selectively scan through the emergent effective temperatures and thereby resolve the scale-dependent activity. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_08116 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Probing scale-dependent liveliness with nonequilibrium thermospectroscopy Mecke, Joscha Kroy, Klaus Soft Condensed Matter Probing the spatially heterogeneous activity across scales is a major challenge in living matter. Energy injection at diverse length scales leads to mode coupling, inter-modal energy transfer, and entropy production. We demonstrate the emergence of multiple effective (``active'') temperatures in nonequilibrium molecular- and Brownian-dynamics simulations of an active polymer. Via a generalised Langevin equation for a labelled monomer we identify spectral noise temperatures and their relation to the underlying activity landscape. A harmonic trap of variable stiffness can serve as a minimally invasive prototypical spectroscopic device to selectively scan through the emergent effective temperatures and thereby resolve the scale-dependent activity. |
| title | Probing scale-dependent liveliness with nonequilibrium thermospectroscopy |
| topic | Soft Condensed Matter |
| url | https://arxiv.org/abs/2603.08116 |