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¹H NMR of Conformationally Flexible Molecules: Variable-Temperature NMR01:15

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Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
11:21

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving

Published on: March 30, 2017

Conical intersections in an ultracold gas.

S Wüster1, A Eisfeld, J M Rost

  • 1Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Strasse 38, 01187 Dresden, Germany.

Physical Review Letters
|May 17, 2011
PubMed
Summary
This summary is machine-generated.

Conical intersections (CIs) are common in multi-atom systems. We demonstrate how CIs influence excitation transport in a circular trimer, offering a new experimental probe of quantum dynamics.

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Last Updated: Jun 2, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
11:21

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Published on: March 30, 2017

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Area of Science:

  • Quantum Chemistry
  • Atomic Physics
  • Molecular Dynamics

Background:

  • Conical intersections (CIs) are critical features in the potential energy surfaces of molecules, governing non-adiabatic dynamics.
  • Transition dipole-dipole interactions are fundamental for understanding energy transfer in molecular systems.

Purpose of the Study:

  • To investigate the generic occurrence and impact of conical intersections in multi-atom systems.
  • To analyze the influence of CIs on adiabatic excitation transport in a circular trimer model.
  • To propose an experimental setup for probing quantum dynamics near CIs.

Main Methods:

  • Theoretical analysis of energy surfaces for systems with more than two atoms interacting via transition dipole-dipole potentials.
  • Modeling adiabatic excitation transport in a circular trimer, considering electronic decoherence and geometric phase interference.
  • Proposing an experimental realization using light alkali atoms in a ring trap with Rydberg state interactions.

Main Results:

  • Energy surfaces of multi-atom systems interacting via transition dipole-dipole potentials generically exhibit conical intersections.
  • Conical intersections significantly affect adiabatic excitation transport through electronic decoherence and geometric phase interference.
  • A circular trimer model effectively demonstrates the impact of CIs on these transport mechanisms.

Conclusions:

  • Conical intersections are a general feature impacting quantum dynamics in multi-atom systems.
  • The proposed experimental setup with alkali atoms and Rydberg states offers a viable method to study many-body density dynamics near CIs.
  • Understanding CI-mediated dynamics is crucial for controlling energy transfer in quantum systems.