Anisotropy effect on magnon entanglement in antiferromagnets

Document Type : Full length research Paper

Author

1 Faculty member, Department of Applied Mathematics and Computer Science, Faculty of Mathematics and Statistics, University of Isfahan, Isfahan 81746-73441, Iran

2 2School of Mathematics, Institute for Research in Fundamental Sciences (IPM), P. O. Box 19395-5746, Tehran, Iran

3 Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden

Abstract

Entanglement is one of the fundamental quantum concepts that not only distinguishes quantum mechanics from its classical counterpart but also plays important roles in quantum communication and information processing technologies. Here, we aim to study anisotropy contributions of continuous variable entanglement between magnon modes in antiferromagnets. By introducing different bosonic modes, it is shown that the magnetic uniaxial anisotropy induces different entanglement contributions in the ground state of the system. While some of these contributions appear to be decreasing with respect to anisotropy, the other contributions are increasing as functions of anisotropy. It is also shown that the maximum magnon entanglement is always at the centre of Brillouin zone. The analysis presented here is independent of geometric lattice structure and appropriate for many classes of compounds.

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References

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History

  • Receive Date: 27 August 2020
  • Revise Date: 21 February 2021
  • Accept Date: 22 April 2021

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