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Related Experiment Videos

Do intense electromagnetic fields annihilate/create conical intersections?

Biplab Sarkar1, Satrajit Adhikari, Michael Baer

  • 1Department of Chemistry, Indian Institute of Technology-Guwahati, North Guwahati, Guwahati 781039, India.

The Journal of Chemical Physics
|January 11, 2007
PubMed
Summary
This summary is machine-generated.

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An intense electric field can alter molecular system topology by affecting nonadiabatic coupling terms, but it does not create or destroy conical intersections. This finding holds for analytic electric, magnetic, or electromagnetic fields.

Area of Science:

  • Theoretical Chemistry
  • Quantum Mechanics
  • Molecular Physics

Background:

  • Topological features in molecular systems are crucial for understanding chemical reactions and molecular properties.
  • Conical intersections are points where potential energy surfaces meet, significantly influencing molecular dynamics.
  • The effect of external fields on molecular topology is an area of ongoing research.

Purpose of the Study:

  • To investigate the influence of intense electric fields on the topological features of molecular systems.
  • To determine if electric fields can create or annihilate conical intersections.
  • To explore the generalizability of these findings to magnetic and electromagnetic fields.

Main Methods:

  • Utilized a theoretical model based on the Mathieu equation to simulate molecular systems.

Related Experiment Videos

  • Analyzed the behavior of nonadiabatic coupling terms under intense electric fields.
  • Examined the positions of intersections of potential energy surfaces.

    • Main Results:

    • An intense electric field was found to affect the spatial distribution of nonadiabatic coupling terms.
    • The position of conical intersections was not altered by the intense electric field.
    • The study confirmed that intense electric fields do not create or annihilate conical intersections.

    Conclusions:

    • Intense electric fields do not change the number or location of conical intersections in molecular systems.
    • The observed effects are valid for analytic electric fields within the region of interest.
    • The conclusions can be extended to magnetic and electromagnetic fields under similar analytic conditions.