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SUMMARY:System-bath quantum dynamics in chemical physics - Professor Peter
  Saalfrank\, University of Potsdam
DTSTART:20191120T141500Z
DTEND:20191120T151500Z
UID:TALK126430@talks.cam.ac.uk
CONTACT:Lisa Masters
DESCRIPTION:\nIn non-equilibrium quantum dynamics arising in chemcial phys
 ics\, often an atom\, a molecule\, or electrons (the “system”) is / ar
 e embedded in an environment (or “bath”)\, which gives rise to energy 
 and phase relaxation. This affects the spectroscopic response of the syste
 m\, its reactivity\, and its dynamics in general.\nIn this talk I will mos
 tly consider the special case of atoms or molecules in contact with solid 
 surfaces\, which play a role in surface spectroscopy and surface photochem
 istry. Here we focus on fundamental aspects of energy and phase relaxation
  by adsorbate-phonon (for all surfaces) and / or adsorbate-electron / hole
  pair coupling (for metal surfaces). A “system plus bath” approach to 
 multidimensional quantum dynamics will be followed\, treated either by a m
 ultidimensional time- dependent Schrödinger equation (using\, for example
 \, the Multi Configurational Time Dependent Hartree (MCTDH) method or an 
 “exactly” solvable\, so called Bixon-Jortner model)\, or by a re- duce
 d description in which an open-system Liouville von Neumann is solved inst
 ead. Issues of Markovianity\, finite temperature effects\, spectroscopy\, 
 and optical controllability of / in open sys- tems will be addressed. Besi
 des model problems\, various concrete examples of energy and phase relaxat
 ion of adsorbed or scattering species at surfaces will be considered\, but
  also spectroscopy in molecular crystals\, and\, if time permits\, laser-d
 riven electron dynamics in condensed phases.
LOCATION:Department of Chemistry\, Cambridge\, Unilever lecture theatre
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