Journal
EPL
Volume 116, Issue 6, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1209/0295-5075/116/60003
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Funding
- ERC [279391]
- Deutsche Forschungsgemeinschaft (DFG) [KR 3844/2-1]
- European Research Council (ERC) [279391] Funding Source: European Research Council (ERC)
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We study the second-order response functions of a colloidal particle being subjected to an anharmonic potential. Contrary to typical response measurements which require an external perturbation, here we experimentally demonstrate that the system's susceptibilities up to second order can be obtained from the particle's equilibrium fluctuations. The measured susceptibilities are in quantitative agreement with those obtained from the response to an external perturbation. Copyright (C) EPLA, 2016
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