Inspecting Non-Perturbative Contributions to the Entanglement Entropy via Wavefunctions

@article{Bhattacharyya2017InspectingNC,
  title={Inspecting Non-Perturbative Contributions to the Entanglement Entropy via Wavefunctions},
  author={Arpan Bhattacharyya and Ling-Yan Hung and Pak Hang Chris Lau and Si-Nong Liu},
  journal={Entropy},
  year={2017},
  volume={19},
  pages={671}
}
In this paper, we would like to systematically explore the implications of non-perturbative effects on entanglement in a many body system. Instead of pursuing the usual path-integral method in a singular space, we attempt to study the wavefunctions in detail. We begin with a toy model of multiple particles whose interaction potential admits multiple minima. We study the entanglement of the true ground state after taking the tunneling effects into account and find some simple patterns. Notably… CONTINUE READING
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