This report synthesises findings from 5 peer-reviewed papers addressing the following research question: To what extent does fine-tuning mDPR with contrastive losses optimized for hyperbolic space improve zero-shot cross-lingual retrieval robustness on low-resource languages in the XOR-TyDi QA dataset. Human knowledge provides a formal understanding of the world. Knowledge graphs that represent structural relations between entities have become an increasingly popular research direction toward cognition and human-level intelligence. 8 claims were extracted from source literature; 8 were independently verified against retrieved documents. An automated multi-reviewer quality assessment produced a score of 8.7/10. This report is a machine-generated literature synthesis and does not constitute original research.Research goal: To what extent does fine-tuning mDPR with contrastive losses optimized for hyperbolic space improve zero-shot cross-lingual retrieval robustness on low-resource languages in the XOR-TyDi QA dataset?Autonomous literature synthesis. Automated review score: 8.7/10. Full text and citation available at Assignee Research.