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Area of Science:

  • Quantum Chemistry
  • Chemical Physics
  • Spectroscopy

Background:

  • Conical intersections are fundamental in molecular processes like vision and catalysis.
  • Geometric phases at conical intersections influence chemical reactions via quantum interference.
  • Direct observation of this wavepacket interference has been lacking.

Purpose of the Study:

  • To experimentally observe geometric-phase interference directly.
  • To investigate wavepacket dynamics around engineered conical intersections.
  • To validate the use of quantum simulators for nuclear quantum effects.

Main Methods:

  • Utilized a programmable trapped-ion quantum simulator.
  • Engineered a conical intersection within the simulator.
  • Developed a technique to reconstruct 2D wavepacket densities.
  • Performed experiments to observe wavepacket dynamics.

Main Results:

  • Successfully observed geometric-phase interference in real-time.
  • Experimental results matched theoretical predictions.
  • Demonstrated wavepacket dynamics around the engineered conical intersection.

Conclusions:

  • Direct observation of geometric-phase interference is now possible.
  • Trapped-ion quantum simulators accurately model nuclear quantum effects.
  • This work advances understanding of fundamental chemical dynamics.