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SUMMARY:Stochastic dynamics of particles in correlated (fluctuating) field
 s. - Andrea Gambassi (SISSA)
DTSTART:20250527T120000Z
DTEND:20250527T130000Z
UID:TALK231247@talks.cam.ac.uk
CONTACT:Sarah Loos
DESCRIPTION:The effective dynamics of a colloidal particle immersed in a c
 omplex medium at equilibrium is usually described in terms of a linear ove
 rdamped Langevin equation\, possibly with memory. However\, numerical simu
 lations and experiments have shown that this linear model fails\, suggesti
 ng that the intrinsic dynamics of the probe is actually non-linear. Focuss
 ing on the case in which the medium is described by a fluctuating and corr
 elated Gaussian field linearly coupled to the tracer\, we derive such a dy
 namics and discuss its various consequences\, including those on the stoch
 astic thermodynamics of a driven particle. When the field is generated by 
 the particle itself\, with negligible fluctuations\, the resulting self-ch
 emotactic dynamics turns out to display anomalous diffusion and run-and-tu
 mble motion in low spatial dimension\, which we characterise analytically.
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LOCATION:Center for Mathematical Sciences\, Lecture room MR4
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