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SUMMARY:Quantum plumbing: the mysteries of nanoscale flows
DTSTART:20230915T133000
DTEND:20230915T143000
DTSTAMP:20260917T055326Z
UID:c90ea7daad1eea630ac7cc018ff0f7b040d2ce7d1aaa365275c06881
CATEGORIES:Conferences - Seminars
DESCRIPTION:Nikita Kavokine studied physics and chemistry at Ecole Normale
  Supérieure (ENS) in Paris. His PhD work\, in the group of Prof. Lydéric
  Bocquet\, involved both theory and experiment in the field of nanoscale f
 luid dynamics. He then obtained a Flatiron Research Fellowship\, and spent
  a year in New York working on advanced numerical methods for condensed ma
 tter systems. Since 2023\, he leads the “Quantum Plumbers” group at th
 e Max Planck Institute for Polymer Research in Mainz\, Germany. His resear
 ch is at the interface between ‘hard’ and ’soft’ condensed matter\
 , focussing on the quantum behavior of liquids near solid surfaces. \nLiq
 uids are usually described within classical physics\, whereas solids requ
 ire the tools of quantum mechanics. I will show how in nanoscale system
 s this distinction no longer holds. At these scales\, liquid flows may in
  fact exhibit quantum effects as they interact with electrons in the sol
 id walls. I will first discuss the quantum friction phenomenon\, where ch
 arge fluctuations in the liquid interact with electronic excitations in t
 he solid to produce a hydrodynamic friction force. Using many-body quant
 um theory\, we predict that this effect is particularly important for wa
 ter flowing on carbon-based materials\, and we obtain experimental evidenc
 e of the underlying mechanism from pump-probe terahertz spectroscopy. I 
 will then show how the theory can be pushed one step further to describe
  hydrodynamic Coulomb drag – the generation of electric current by a l
 iquid in the solid along which it flows. This phenomenon involves a subt
 le interplay of electrostatic and electron-phonon interactions\, and sugg
 ests strategies for designing materials with low hydrodynamic friction.\
 n\n\n 
LOCATION:SV 1717 https://plan.epfl.ch/?room==SV%201717
STATUS:CONFIRMED
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