Quantum correlations in spin models
Guo-Feng Zhang, Heng Fan, Ai-Ling Ji, Zhao-Tan Jiang, Ahmad Abliz and, Wu-Ming Liu
TL;DR
This paper investigates quantum correlations in two-qubit spin models using various measures, analyzing how external parameters influence nonclassical correlations and comparing different quantum correlation indicators.
Contribution
It introduces a detailed comparison of multiple quantum correlation measures in spin models, highlighting their distinct behaviors under various physical parameters.
Findings
Quantum correlations depend on magnetic field, coupling, and DM interaction.
Different measures of quantum correlations show unique characteristics.
Bell nonlocality, entanglement, MID, and GQD exhibit diverse responses to parameters.
Abstract
Bell nonlocality, entanglement and nonclassical correlations are different aspects of quantum correlations for a given state. There are many methods to measure nonclassical correlations. In this paper, nonclassical correlations in two-qubit spin models are measured by use of measurement-induced disturbance (MID) [Phys. Rev. A, 77, 022301 (2008)] and geometric measure of quantum discord (GQD) [Phys. Rev. Lett. 105, 190502 (2010)]. Their dependencies on external magnetic field, spin-spin coupling, and Dzyaloshinski-Moriya (DM) interaction are presented in detail. We also compare Bell nonlocality, entanglement measured by concurrence, MID and GQD and illustrate their different characteristics.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.