Non-Markovian Protection and Thermal Fragility of Quantum Resources in a Spin-1/2 Ising-Heisenberg Diamond Chain

TL;DR

This paper explores how quantum correlations like entanglement and nonlocality behave under non-Markovian noise in a spin chain, revealing conditions that enhance or diminish quantum resources at finite temperatures.

Contribution

It provides a detailed analysis of quantum resource dynamics under realistic non-Markovian decoherence, highlighting the roles of thermal effects and system parameters in quantum correlation robustness.

Findings

Entanglement shows revival under amplitude damping and RTN.

Uncertainty-induced nonlocality remains resilient at high temperatures.

Thermal activation and magnetic fields can modulate quantum correlations.

Abstract

This research investigates the dynamics of entanglement and uncertainty-induced nonlocality in a spin-1/2 Ising-Heisenberg diamond chain subjected to local non-Markovian decoherence channels. By examining amplitude damping and random telegraph noise in both zero and finite temperature regimes, the study reveals nuanced distinctions in the degradation and revival of quantum correlations. The interplay between intrinsic spin couplings, thermal effects, and memory-induced coherence backflow highlights the complex behavior of quantum resources under realistic noise conditions. Concurrence emerges as a sensitive marker of entanglement recovery in dephasing environments, while uncertainty-induced nonlocality proves more resilient in high-temperature or dissipative regimes. The analysis further demonstrates that moderate thermal activation and external magnetic fields can nontrivially enhance or suppress quantum features depending on system parameters. These findings offer a detailed perspective on the robustness and complementarity of different quantum correlation measures, providing guiding principles for the design of thermally stable and noise-resilient quantum information protocols.