The question of quantum communication between cancer cells

This letter evaluates the speculative hypothesis of quantum communication between cancer cells, contrasting it with well-established classical signaling mechanisms (e.g., chemical diffusion). While quantum physics permits entanglement-based information transfer, no direct empirical evidence supports this in biology. The focus is on biophotons (UPE) as potential mediators, citing Fritz-Albert Popp's coherence hypothesis. Proponents highlight delayed luminescence and non-classical photon statistics, while critics attribute UPE to random chemiluminescence and argue against sustained quantum coherence in noisy cellular environments. Other quantum signatures such as Fano resonances and vibronic coupling are also discussed. This paper advances a specific hypothesis that the unique metabolic and redox state of cancer cells could create conditions for transient, short-range quantum signaling mediated by biophotons. Though quantum effects like proton tunneling occur in cancer mutagenesis and enzymatic catalysis, these differ fundamentally from unproven intercellular quantum signaling. Photosynthesis' quantum coherence offers intriguing parallels, but cancer progression is well-explained classically. The hypothesis remains intriguing yet highly speculative, lacking robust empirical validation and facing significant theoretical hurdles related to decoherence and the maintenance of fragile quantum states. Rigorous experimental evidence is needed before accepting quantum mechanisms in cellular communication. This debate aligns with the burgeoning fields of bio photonics and quantum biology, urging interdisciplinary research to test these theoretical possibilities with advanced experimental techniques. Specific, testable protocols involving photon correlation measurements are proposed to validate or falsify this hypothesis.