Entanglement detection via quantum Fisher information in an XY dimer

Authors

Rafael S. dela Rosa ⋅ PH National Institute of Physics, University of the Philippines Diliman
Apolinario Miguel I. Tan ⋅ PH National Institute of Physics, University of the Philippines Diliman
Francis N. C. Paraan ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

We use an entanglement criterion that is based on the quantum Fisher information to detect entanglement in thermal mixed states of an XY dimer. In the absence of an external magnetic field we find that it detects entanglement only in the anisotropic regions beyond the Ising line. Entanglement is destroyed at high temperatures, and this criterion is only able to detect entanglement at a lower threshold temperature than concurrence.

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Issue

2021: Proceedings of the 39th Samahang Pisika ng Pilipinas Physics Conference

Accelerating national progress via physics: From quantum to stellar and beyond
20-22 October 2021

Please visit the SPP2021 activity webpage for more information on this year's Physics Congress.

Article ID

SPP-2021-PA-05

Section

Poster Session A (Condensed Matter Physics and Materials Science)

Published

2021-10-14

How to Cite

[1]

RS dela Rosa, AMI Tan, and FNC Paraan, Entanglement detection via quantum Fisher information in an XY dimer, Proceedings of the Samahang Pisika ng Pilipinas 39, SPP-2021-PA-05 (2021). URL: https://proceedings.spp-online.org/article/view/SPP-2021-PA-05.