宇宙中约有70%由推动膨胀的暗能量组成，另有25%由凝聚星系的暗物质构成，两者向来被视为互不相干的独立隐形成分。然而，暗能量光谱仪（DESI）的最新观测发现暗能量强度并非常数，甚至出现看似违反能量守恒的「幽灵状态」，促使理论物理学家转而探讨暗能量与暗物质在物理上相互交织、彼此影响的可能性。

物理学家提出若将暗能量与暗物质耦合，例如暗物质在早期将微量能量转移给暗能量，便能自然解释暗能量看似增强的现象，而无需诉诸非物理的假设。这种交互作用模型同时为解决宇宙学长年难题「哈伯张力」提供了契机，使早期宇宙与近期宇宙量测出的膨胀率差异得以被合理解释，而非单纯的系统误差。

弦论学家进一步推测两者可能源于共同机制，例如与微米级的「暗维度」相关联，使得引力子在渗漏后化为具质量的暗引力子扮演暗物质，同时自然耦合暗能量。该模型预测暗能量与暗物质质量将随时间同步递减，且其间可能存在超越重力的长程作用力，这项来自弦论的推论目前与天文观测限制吻合，为验证暗宇宙统一理论开辟了新途径。

Dark energy and dark matter make up approximately 70 percent and 25 percent of the cosmos, respectively, and have long been treated as separate invisible entities. However, recent observations from the Dark Energy Spectroscopic Instrument (DESI) reveal that dark energy is not constant and may enter an apparent 'phantom regime,' prompting theoretical physicists to reconsider the possibility that dark energy and dark matter are physically intertwined.

Physicists propose that coupling dark energy and dark matter—such as through energy transfer from dark matter to dark energy in an earlier cosmic epoch—naturally accounts for the observed phantom-like behavior without violating physical principles. Crucially, such interaction models also help resolve the longstanding 'Hubble tension,' turning the discrepancy between early- and late-universe expansion rate measurements from a cosmological crisis into an expected outcome.

String theorists suggest a shared origin where both components connect to an enlarged 'dark dimension' on the micron scale, in which gravitons acquire mass to act as dark matter while naturally coupling with varying dark energy. This model predicts that both dark energy density and dark matter mass diminish in concert over time, yielding testable predictions of new long-range forces that remain consistent with existing astrophysical observational bounds.