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DTSTART:20250330T030000
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BEGIN:VEVENT
DTSTAMP:20260425T051626Z
UID:67c99ba4c384a832101644@ist.ac.at
DTSTART:20250612T100000
DTEND:20250612T110000
DESCRIPTION:Speaker: Olivier Pierre-Louis\nhosted by Carl Goodrich\nAbstrac
 t: We have investigated theoretically how one can manipulate the shape of 
 a small cluster of colloids (or nano-particles) using a macroscopic extern
 al field in the presence of thermal fluctuations [1\,2\,3]. This problem c
 an be formulated as a minimization of first passage times in configuration
  space. We obtain the optimal policy to reach an arbitrary target configur
 ation using Dynamic Programming. We then show how the efficiency of Reinfo
 rcement-Learning vanishes at the nanoscale due to thermal fluctuations [4]
 .We have also applied a similar approach to the navigation of a single col
 loid. We have determined the changes in the optimal policy in the presence
  of frozen disorder [5]. Surprisingly\, strong changes in the optimal navi
 gation policy are found for disorder with low densities of defects.Referen
 ces:[1] F Boccardo\, O Pierre-Louis Physical Review Letters 128\, 256102 (
 2022)\;[2] F Boccardo\, Y Benamara\, O Pierre-Louis Physical Review E 106\
 , 024120 (2022)\;[3] F Boccardo\, O Pierre-Louis Journal of Statistical Me
 chanics(10)\, 103205 (2022)[4] F Boccardo\, O Pierre-Louis Phys. Rev. E 11
 0\, L023301 (2024)\;[5] K Bilai Biloa and O Pierre-Louis\, preprint (2025)
 .
LOCATION:Office Bldg West / Ground floor / Heinzel Seminar Room (I21.EG.101
 )\, ISTA
ORGANIZER:cpetz@ist.ac.at
SUMMARY:Olivier Pierre-Louis: Controlling the shape of colloid clusters\, a
 nd colloid navigation
URL:https://talks-calendar.ista.ac.at/events/5799
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