Thermal Effects on Quantum Coherence and Local Quantum Fisher Information in 2D Tilted Dirac Materials

Abstract

This study explores quantum coherence and local quantum Fisher information (LQFI) in a 2D material featuring a tilted Dirac cone. The analysis focuses on the influence of temperature, wave vector components, and isotropic Fermi velocities. Results show that increasing the isotropic Fermi velocities improves both coherence and LQFI. These quantities also become stronger with larger wave vectors but degrade under higher temperatures. Notably, coherence demonstrates greater resistance to thermal noise compared to quantum Fisher information. A comparison between graphene and 8‐ pmmn borophene highlights the superior performance of graphene. The findings provide useful insights for designing materials for advanced quantum technologies.