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SUMMARY:Beyond the Mean Squared Displacement: Revealing Fickian Non-Gaussi
 an Diffusion with Differential Dynamic Microscopy
DTSTART:20260921T123000Z
DTEND:20260921T133000Z
DTSTAMP:20260929T071700Z
UID:indico-event-1924@indico.dfa.unipd.it
DESCRIPTION:Speakers: Andrea de Marco (DFA UniPD)\n\nFickian non-Gaussian 
 diffusion (FnGD) combines a mean-squared displacement growing linearly wit
 h time with a non-Gaussian displacement distribution. It is conventionally
  identified through single-particle tracking (SPT)\, a well-established te
 chnique that requires reliable tracer detection and trajectory reconstruct
 ion. These requirements become limiting when particles cannot be individua
 lly resolved or consistently linked across successive frames.\nDifferentia
 l dynamic microscopy (DDM) offers a complementary approach. Without resolv
 ing or tracking individual particles\, DDM extracts ensemble dynamics from
  intensity fluctuations in microscopy videos in a form analogous to a scat
 tering experiment\, while retaining the advantages of real-space imaging.\
 nHere\, we study colloidal tracers diffusing in a static optical speckle l
 andscape and use SPT as a benchmark for the DDM analysis. From a single ex
 periment\, DDM probes dynamics over multiple length scales\, or scattering
  wave vectors q. This wave-vector-resolved description reveals reciprocal-
 space signatures of FnGD and provides a route for identifying non-Gaussian
  transport when conventional particle tracking is impractical.\n\nhttps://
 indico.dfa.unipd.it/event/1924/
LOCATION:P1A (Dipartimento di Fisica e Astronomia - Edificio Ricci-Curbast
 ro (ex-Paolotti))
URL:https://indico.dfa.unipd.it/event/1924/
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