A Broader Perspective about Organization and Coherence in Biological Systems

The implications of large-scale coherence in biological systems and possible links to quantum theory are only beginning to be explored. Whether quantum-like coherent phenomena are relevant, or even possible at all, at the high temperatures of biological systems remains unsettled. Here, we present a broader perspective on biological organization and how quantum-like dynamics and coherence might shape the very fabric from which complex biological systems are organized. Regardless of its exact nature, a unique form of coherence seems apparent at multiple scales in biology and its better characterization may have broad consequences for the understanding of living organisms as complex systems.

💡 Research Summary

The paper tackles the controversial question of whether quantum‑like coherent phenomena can exist and play a functional role in the warm, noisy environments typical of living organisms. After reviewing the historical focus of quantum biology on low‑temperature, single‑molecule experiments, the authors argue that several biological observations—such as the remarkably high energy‑transfer efficiency in photosynthetic antenna complexes, long‑range vibrational synchrony in microtubules, and non‑classical kinetic behavior in enzyme networks—cannot be fully explained by classical thermodynamics alone. To bridge this gap, they introduce a two‑tier definition of coherence. “Correlational coherence” refers to the synchronization of phase, vibrational, or spin states among microscopic components, allowing them to share quantum‑like information. “Structural coherence” denotes the maintenance of consistent form and function across larger scales, from membranes to tissues and organs. The authors propose that these two forms of coherence are mutually reinforcing, providing pathways for microscopic quantum effects to influence macroscopic biological organization.

A central challenge is the rapid decoherence expected at physiological temperatures. The authors identify three plausible mechanisms that could mitigate decoherence: (1) physical shielding within protein complexes or microtubule interiors that isolates functional sub‑systems from thermal noise; (2) dynamic re‑synchronization driven by continual energy input (e.g., from respiration or photosynthesis) that constantly “refreshes” coherent states; and (3) nonlinear interactions that exploit quantum‑nonlinearities to create self‑stabilizing feedback loops. They cite experimental evidence of electron tunneling in mitochondrial electron‑transport chains as a concrete example of quantum‑like transport persisting under biologically relevant conditions.

The paper then explores the functional consequences of multiscale coherence. At the cellular level, correlational coherence could enhance signal fidelity and speed, enabling simultaneous chemical and electrical communication with minimal loss. At the tissue level, structural coherence could underlie pattern formation, adaptive remodeling, wound healing, and immune responses, suggesting that evolution may have selected for mechanisms that preserve coherence because they confer a fitness advantage. The authors argue that traditional reductionist models are insufficient; instead, a hybrid framework that merges complex‑systems theory with quantum information concepts is required.

To test these ideas, the authors outline an experimental roadmap that includes ultra‑sensitive spectroscopic techniques (e.g., two‑dimensional infrared, femtosecond Raman), adapted Bell‑type tests for biological samples, quantum state tomography, and multiscale computational simulations that couple quantum molecular dynamics with network‑level models. Such approaches would quantify not only the presence of coherence but also its spatial extent, temporal stability, and functional impact.

In conclusion, the authors posit that quantum‑like coherence may be a fundamental organizing principle in biology, linking microscopic quantum dynamics with macroscopic physiological function. They emphasize that confirming this hypothesis would dissolve long‑standing disciplinary boundaries, prompting a new paradigm in which living systems are viewed as complex quantum‑coherent entities. The paper thus serves both as a conceptual synthesis and a practical guide for future interdisciplinary research.