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Quantum Chemistry

Realization of Heisenberg models of spin systems with polar molecules in pendular states

arXiv
Authors: Wenjing Yue, Qi Wei, Sabre Kais, Bretislav Friedrich, Dudley Herschbach

Year

2021

Paper ID

40133

Status

Preprint

Abstract Read

~2 min

Abstract Words

119

Citations

N/A

Abstract

We show that ultracold polar diatomic or linear molecules, oriented in an external electric field and mutually coupled by dipole-dipole interactions, can be used to realize the exact Heisenberg XYZ, XXZ and XY models without invoking any approximation. The two lowest lying excited pendular states coupled by microwave or radio-frequency fields are used to encode the pseudo-spin. We map out the general features of the models by evaluating the models' constants as functions of the molecular dipole moment, rotational constant, strength and direction of the external field as well as the distance between molecules. We calculate the phase diagram for a linear chain of polar molecules based on the Heisenberg models and discuss their drawbacks, advantages, and potential applications.

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  • We show that ultracold polar diatomic or linear molecules, oriented in an external electric field and mutually coupled by dipole-dipole interactions, can be used to realize the...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2112.14981 [2] arXiv https://arxiv.org/abs/2112.14981 [3] Publisher https://arxiv.org/abs/2112.14981

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