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Related Experiment Video

Updated: Jul 17, 2025

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
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Quantum simulation of conical intersections using trapped ions.

Jacob Whitlow1,2, Zhubing Jia1,3,4, Ye Wang1,2,5

  • 1Duke Quantum Center, Duke University, Durham, NC, USA.

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|August 28, 2023
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Summary
This summary is machine-generated.

Scientists simulated a conical intersection using trapped ions, directly observing the geometric phase for the first time in a molecular system. This quantum simulation advances understanding of photochemical reactions.

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Area of Science:

  • Quantum simulation
  • Photochemistry
  • Chemical reaction dynamics

Background:

  • Conical intersections govern photochemical reaction outcomes by enabling transitions between electronic states.
  • Theoretical models predict a geometric phase accompanying wavepacket evolution on the ground potential energy surface at conical intersections.
  • Direct experimental observation of this geometric phase in molecular systems remains elusive.

Purpose of the Study:

  • To perform a quantum simulation of a conical intersection using a trapped atomic ion system.
  • To experimentally observe the predicted geometric phase associated with conical intersections.

Main Methods:

  • Utilized a trapped atomic ion system where internal states represent electronic states and ion motion mimics nuclear motion.
  • Constructed a simulated electronic potential by applying state-dependent optical forces to the ions.
  • Employed adiabatic state preparation and motional state measurement to detect the geometric phase.

Main Results:

  • Successfully simulated a conical intersection in a trapped atomic ion system.
  • Provided the first direct experimental observation of the geometric phase in a quantum simulation of a molecular system.
  • Demonstrated the utility of combining spin and motional degrees of freedom for quantum simulation.

Conclusions:

  • The geometric phase at conical intersections can be experimentally observed using quantum simulation techniques.
  • Trapped ion systems offer a powerful platform for simulating complex chemical phenomena like conical intersections.
  • This work opens new avenues for studying reaction dynamics and quantum effects in chemistry.