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THU: Thursday Contributed Sessions

THU 8: Frustrated Quantum Systems: Contributed Session to Symposium

THU 8.7: Talk

Thursday, September 11, 2025, 15:45–16:00, ZHG009

Quantifying entanglement in frustrated transverse-field Ising model — •Leonardo dos Santos Lima — lslima@cefetmg.br

In this paper, we analyzed the effect of quantum phase transition (QPT) on quantum correlation and entanglement in the frustrated antiferromagnetic transverse-field Ising model on ruby lattice. We get the reduced density matrix entropy as a function of exchange interactions J_i (i=1,2,3) and external transverse-field h which induces phases transitions in the system, with the aim to verify its influence on quantum correlation and entanglement. We get that the effect of opening of the gap in the spectrum generates a small variation in the behavior of the von Neumann entropy (VN) due to the fact that analyzing the influence of QPT on entanglement in quantum spin systems is a complex field and an intriguing task in recent years. We focus on how these frustrating competing interactions and the different phases affect the quantum correlation and entanglement.

Keywords: entanglement entropy; transverse-field Ising model