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SUMMARY:Analysis and control of electron dynamics: An ab-initio perspectiv
 e on the femto-second time scale
DTSTART:20150928T170000
DTEND:20150928T180000
DTSTAMP:20260510T135123Z
UID:0796104ce7dd5f2337d7ae501eb35f1a0f316bc8dc64be609a2e4fa2
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Eberhard Gross\nBio: Eberhard Gross\, born in 1953 in Fr
 ankfurt am Main\, studied mathematics and physics in Frankfurt and receive
 d his doctorate in 1980 in theoretical physics. After that he went as a po
 stdoc to Santa Barbara\, where he collaborated with the later Nobel laurea
 te Walter Kohn. In 1986 he qualified as a professor in Frankfurt\, and wen
 t in the same year as a Heisenberg Fellow back to the University of Califo
 rnia. From 1990 he was Fiebiger professor at Würzburg University and from
  2001 to 2009 professor at the Free University of Berlin. 2003-2004 he was
  a Visiting Fellow at Trinity College\, Cambridge / UK\, 2004\, he receive
 d a Schlumberger Award. Since 2005 he has been a Max Planck Fellow at the 
 Fritz Haber Institute of the Max Planck Society. 2005-2008 he was presiden
 t of the Centre Européen de Calcul Atomique et Moléculaire (CECAM).\nThi
 s lecture is about the motion of electrons\, how it can be monitored\, ana
 lyzed and\, ultimately\, controlled with external fields on the femto-seco
 nd time scale. The investigations are performed with ab-initio simulations
 \, using time-dependent density functional theory as theoretical tool. We 
 shall visualize the laser-induced formation and breaking of chemical bonds
  in real time\, and we shall adress questions like: How much time does an 
 electron need to complete a transition from one state to another? Another 
 main topic will be quantum transport. Time-dependent features of the elect
 ronic current through nano-scale junctions will be studied for electron pu
 mps and molecular optical switches. A combination of quantum optimal contr
 ol theory with time-dependent density functional theory will be presented 
 as a method to compute laser pulses that are optimized to achieve a given 
 goal. As an example\, we shall calculate the laser pulse needed to switch 
 the chirality of currents in quantum rings. Finally we will study the ultr
 afast laser induced demagnetisation of ferromagnetic solids.
LOCATION:CM 1 1 https://plan.epfl.ch/?room==CM%201%201
STATUS:CONFIRMED
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