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SUMMARY:Attosecond spectroscopy: observing electron dynamics in molecules\
 , clusters and liquids
DTSTART:20260430T170000
DTEND:20260430T183000
DTSTAMP:20260526T061840Z
UID:10906246de9d919116151b9c65f810550f57a7d77d9281564e8880a9
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Hans Jakob Wörner (ETHZ)\nAttosecond spectroscopy enabl
 es the direct observation of electron dynamics on their natural timescale.
  Its ability to freeze nuclear motion on the shortest time scales constitu
 tes a powerful approach to understanding the complex interplay of electron
 ic and nuclear dynamics that underlies chemistry.\nIn molecules\, attoseco
 nd transient-absorption spectroscopy reveals purely electronic charge migr
 ation\, including its decoherence and revival driven by nuclear motion and
  the transfer of electronic coherence through conical intersections [1]. I
 t resolves charge-transfer dynamics at conical intersections\, including a
  measurable ~1.5-fs delay in population transfer that reflects a non-insta
 ntaneous multi-electron rearrangement [2]. Extending to more complex syste
 ms\, attosecond spectroscopy of water clusters uncovers how the spatial ex
 tension of electronic wavefunctions evolves with system size [3]\, while s
 tudies in liquids identify the roles of solvation and electron transport i
 n photoionization dynamics [4] and disentangle electronic from structural 
 dynamics during proton transfer in aqueous solution [5]. A recent breakthr
 ough is the ability of generating and fully characterizing circularly pola
 rized attosecond pulses\, which enable the measurement and control of elec
 tron dynamics and photoionization delays of chiral molecules\, opening new
  perspectives for controlling chiral dynamics on electronic time scales [6
 ].\n\n[1] D. Matselyukh\, et al. Nat. Phys. 18\, 1206 (2022)\n[2] D. Matse
 lyukh et al.\, Nat. Comm. 16\, 7211 (2025)\n[3] X. Gong et al.\, Nature 60
 9\, 507 (2022)\n[4] I. Jordan et al.\, Science 369\, 974 (2020)\n[5] Z. Yi
 n et al.\, Nature 619\, 749 (2023)\n[6] M. Han et al.\, Nature 645\, 95 (2
 025)\n\n 
LOCATION:CH G1 495 https://plan.epfl.ch/?room==CH%20G1%20495
STATUS:CONFIRMED
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