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arXiv · 1807.02171

Analysis of continuous and discrete Wigner approximations for spin dynamics

Bhuvanesh Sundar·Kenneth C Wang·Kaden R A Hazzard
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Abstract

We compare the continuous and discrete truncated Wigner approximations of various spin models' dynamics to exact analytical and numerical solutions. We account for all components of spin-spin correlations on equal footing, facilitated by a recently introduced geometric correlation matrix visualization technique [R. Mukherjee {\em et al.}, Phys. Rev. A {\bf 97}, 043606 (2018)]. We find that at modestly short times, the dominant error in both approximations is to substantially suppress spin correlations along one direction.

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Bhuvanesh Sundar, Kenneth C Wang, Kaden R A Hazzard. 2018-07-05. Analysis of continuous and discrete Wigner approximations for spin dynamics. https://doi.org/10.1103/physreva.99.043627

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