Ground state entanglement entropy in a coupled spin-1/2 dimer with Dzyaloshinsky-Moriya interaction

  • Rafael S. dela Rosa National Institute of Physics, University of the Philippines Diliman
  • Francis N. C. Paraan National Institute of Physics, University of the Philippines Diliman

Abstract

We study the ground state entanglement entropy in a spin-1/2 dimer with Dzyaloshinsky-Moriya (DM) and Heisenberg interactions in a Zeeman field. For a fixed magnitude of the DM vector, the ground state entanglement entropy increases from the ferromagnetic to the anti-ferromagnetic limits of the Heisenberg interaction. In the case of anti-ferromagnetic interactions with strong Zeeman splitting there exists a non-zero value of the DM magnitude that minimizes ground state entanglement. A region of the ground state phase diagram is also described where a critical DM magnitude separates separable and maximally entangled ground states.

Published
2018-06-01
How to Cite
[1]
R. dela Rosa and F. N. Paraan. Ground state entanglement entropy in a coupled spin-1/2 dimer with Dzyaloshinsky-Moriya interaction, Proceedings of the Samahang Pisika ng Pilipinas 36, SPP-2018-PB-52 (2018). URL: https://paperview.spp-online.org/proceedings/article/view/SPP-2018-PB-52.
Section
Poster Session B (Complex Systems, Simulations, and Theoretical Physics)