Disorder and Decoherence: Obstacles or Opportunities for Collective Excitations?
Prof. Hsing-Ta Chen - Dept. of Chemistry and Biochemistry, University of Notre Dame, USA
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2024-12-23 12:10:00 ~
2024-12-23 13:00:00See event details for additional info.
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R36173, 1F, Dept. of Physics, Building of Science College, NCKU
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Disorder and Decoherence: Obstacles or Opportunities for Collective Excitations?
Prof. Hsing-Ta Chen - Dept. of Chemistry and Biochemistry, University of Notre Dame, USA
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DATE |
2024-12-23 |
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TIME |
12:10-13:00 |
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PLACE |
R36173, 1F, Dept. of Physics, Building of Science College, NCKU |
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FIELD |
Quantum Information Science |
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SPEAKER |
Prof. Hsing-Ta Chen - Dept. of Chemistry and Biochemistry, University of Notre Dame, USA |
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TITLE |
Disorder and Decoherence: Obstacles or Opportunities for Collective Excitations? |
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ABSTRACT |
Harnessing strong light-matter interactions between molecular/material excitations and confined electromagnetic fields opens up new opportunities to manipulate chemical reactivity and charge transport at the microscopic level. Recent reports demonstrate that, as electronic or vibrational excitations of a molecular ensemble are strongly coupled with photon modes (for example near a plasmonic nanoparticle or within a microcavity), collective, delocalized excitations among molecules lead to intriguing phenomena that are fundamentally distinct from conventional photoexcitation. However, significant discrepancies between theoretical predictions and experimental observations often stem from the neglect of molecular disorder and photon decoherence. While the consensus is that these effects are detrimental to collective excitation, our recent studies reveal a more complicated interplay. In this talk, I will discuss our recent efforts to account for these interplay in molecular ensembles and outline our plans to develop a theoretical framework for simulating collective excitations in materials. |
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