Direct observation of geometric phase in dynamics around a conical
intersection
- URL: http://arxiv.org/abs/2211.07320v3
- Date: Fri, 11 Aug 2023 05:07:33 GMT
- Title: Direct observation of geometric phase in dynamics around a conical
intersection
- Authors: Christophe H. Valahu and Vanessa C. Olaya-Agudelo and Ryan J.
MacDonell and Tomas Navickas and Arjun D. Rao and Maverick J. Millican and
Juan B. P\'erez-S\'anchez and Joel Yuen-Zhou and Michael J. Biercuk and
Cornelius Hempel and Ting Rei Tan and Ivan Kassal
- Abstract summary: We experimentally observe geometric-phase interference in the dynamics of a wavepacket travelling around an engineered conical intersection.
We develop a technique to reconstruct the two-dimensional wavepacket densities of a trapped ion.
Experiments agree with the theoretical model, demonstrating the ability of analog quantum simulators to accurately describe nuclear quantum effects.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Conical intersections are ubiquitous in chemistry and physics, often
governing processes such as light harvesting, vision, photocatalysis, and
chemical reactivity. They act as funnels between electronic states of
molecules, allowing rapid and efficient relaxation during chemical dynamics. In
addition, when a reaction path encircles a conical intersection, the molecular
wavefunction experiences a geometric phase, which can affect the outcome of the
reaction through quantum-mechanical interference. Past experiments have
measured indirect signatures of geometric phases in scattering patterns and
spectroscopic observables, but there has been no direct observation of the
underlying wavepacket interference. Here, we experimentally observe
geometric-phase interference in the dynamics of a wavepacket travelling around
an engineered conical intersection in a programmable trapped-ion quantum
simulator. To achieve this, we develop a technique to reconstruct the
two-dimensional wavepacket densities of a trapped ion. Experiments agree with
the theoretical model, demonstrating the ability of analog quantum simulators
-- such as those realised using trapped ions -- to accurately describe nuclear
quantum effects.
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