Importance of Geometric Phase Effects in Ultracold Chemistry

The Journal of Physical Chemistry. a
Jisha HazraNaduvalath Balakrishnan

Abstract

It is demonstrated that the inclusion of the geometric phase has an important effect on ultracold chemical reaction rates. The effect appears in rotationally and vibrationally resolved integral cross sections as well as cross sections summed over all product quantum states. The effect arises from interference between scattering amplitudes of two reaction pathways: a direct path and a looping path that encircle the conical intersection between the two lowest adiabatic electronic potential energy surfaces. It is magnified when the two scattering amplitudes have comparable magnitude and they scatter into the same angular region which occurs in the isotropic scattering characteristic of the ultracold regime (s-wave scattering). Results are presented for the O + OH → H + O2 reaction for total angular momentum quantum number J = 0-5. Large geometric phase effects occur for collision energies below 0.1 K, but the effect vanishes at higher energies when contributions from different partial waves are included. It is also qualitatively demonstrated that the geometric phase effect can be modulated by applying an external electric field allowing the possibility of quantum control of chemical reactions in the ultracold regime. In this case,...Continue Reading

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Citations

Oct 27, 2016·The Journal of Chemical Physics·N Balakrishnan
Nov 3, 2016·The Journal of Chemical Physics·B K KendrickN Balakrishnan
Jul 20, 2017·Nature Communications·J F E CroftS Kotochigova
Nov 10, 2015·Physical Review Letters·B K KendrickN Balakrishnan
Feb 3, 2018·The Journal of Chemical Physics·Brian K Kendrick
Feb 13, 2021·Physical Chemistry Chemical Physics : PCCP·Brian K KendrickNaduvalath Balakrishnan
Feb 25, 2021·The Journal of Physical Chemistry Letters·Jiayu HuangDong H Zhang
Oct 28, 2019·The Journal of Physical Chemistry. a·Brian K Kendrick

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