Light Field
The nervous system does more than conduct electricity—it radiates light. Neurons emit ultraweak photons, born from metabolic reactions, often in the mitochondria, during signaling. These emissions are invisible to our eyes but measurable in laboratories, revealing that the brain’s communication is not purely electrical and chemical. Every neural impulse carries a faint light signature.
In the realm of supercomputers, simulating even a few interacting photons requires colossal processing power, because every quantum state, phase shift, and entanglement pathway must be calculated. Yet in living tissue, billions of neurons may exchange photons continuously, without effort, suggesting that biology has evolved to integrate photonic processes directly into its computation. If these photons are coherent or phase-correlated, they could form interference patterns—parallel information channels operating at light speed—extending far beyond the capacity of classical signals.
These light emissions do not stay confined to the brain. Ultraweak photon signals have been measured from skin, blood, and other organs, implying that the entire body participates in a distributed photonic network. This network may coordinate biological rhythms, synchronize distant systems, and integrate sensory, emotional, and cognitive states into a unified whole. In this view, neurons are the primary light generators, but every cell plays a role in sustaining and shaping the organism’s photonic field.
The concept echoes phase invention in quantum observation, where coherence determines how possibilities collapse into reality. If the body’s photon field is phase-organized, then consciousness might emerge not solely from neural computation, but from the coherence of the entire light-based system.
While our technology struggles to simulate such complexity, nature has already built it into the fabric of life. We are not just bioelectrical beings—we are luminous networks, with consciousness emerging from the dance of light that threads through every cell.
1. Neurons as Emitters of Light
The nervous system has long been understood as a network of electrochemical signals, transmitting impulses along axons and across synapses. But over the last few decades, experiments have shown that neurons also emit ultraweak photons—packets of light energy arising from biochemical reactions inside cells. These biophotons, typically in the ultraviolet to near-infrared spectrum, are emitted at intensities far below what the human eye can detect, but their presence is undeniable when measured with advanced instruments such as photomultiplier tubes or cooled CCD cameras.
The origin of these light emissions is closely linked to cellular metabolism. Neurons are energy-intensive cells, rich in mitochondria that continuously convert nutrients into ATP, the cell’s primary energy currency. During oxidative metabolism, reactive oxygen species (ROS) are generated as byproducts, and their recombination or relaxation can release photons. Each photon, though weak, carries precise energy and wavelength characteristics that may be meaningful within the biological environment.
Far from being random noise, many researchers hypothesize that this biophotonic activity may play a role in communication, signaling, or regulation within the nervous system. The consistent emission patterns observed in healthy neurons—and the changes detected in pathological states—suggest that these photons are not merely metabolic waste but part of a structured, evolutionarily optimized system of information transfer.
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2. The Challenge of Photon Simulation
Photons, while massless, are incredibly complex to model computationally. Unlike classical particles that follow predictable trajectories, photons are governed by quantum mechanics, meaning they can exist in multiple possible states simultaneously. Each state carries parameters such as phase, polarization, energy level, and spatial mode. Simulating these states requires tracking an exponentially growing number of variables, which is why even the world’s most powerful supercomputers struggle to model large-scale photon interactions.
To illustrate, a classical simulation of a single photon interacting with several mirrors, beam splitters, or nonlinear media must calculate the probability amplitudes of every possible path it could take. When multiple photons are involved—especially if they are entangled—the computational burden explodes. This is why many quantum optical problems quickly become intractable for even petaflop-scale machines.
Yet in the biological domain, living systems appear to handle vast numbers of photons and their interactions with ease and stability. This disparity suggests that nature has evolved mechanisms for processing photonic information in a way that is fundamentally different—and potentially more efficient—than our artificial computing architectures. Understanding this could revolutionize both neuroscience and quantum information science.
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3. Photons as High-Bandwidth Information Carriers
Electrical signals in neurons typically convey information through variations in firing rate and timing, a mode of communication that is both efficient and robust. However, photons can encode far more variables than just “on” or “off.” A single photon can store information in wavelength, polarization, orbital angular momentum, and phase, making it a high-bandwidth carrier of data. This means that a photon-based communication system could potentially transmit orders of magnitude more information than purely electrical signaling.
In engineered systems, such as optical fibers, multiple information channels can be multiplexed within a single beam of light. A similar principle, if applied in biological tissues, could allow for parallel processing at speeds approaching the speed of light. This could provide a substrate for instantaneous integration of sensory, cognitive, and emotional states, unifying different regions of the nervous system in real time.
If neurons are capable of generating and detecting subtle differences in photon properties, the implications are profound. It would suggest that the human body already operates as a biological optical network, one that naturally incorporates multi-dimensional data encoding. This would position photonic signaling as a hidden yet critical layer of human cognition and perception.
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4. Coherence and Quantum-Like Behavior
Not all light is created equal. While most natural light sources emit photons in random phases, coherent light—like that of a laser—has all its photons oscillating in phase with each other. Coherence allows for interference patterns, a hallmark of quantum-like information storage and processing. Some experiments suggest that biophotons from living tissue may exhibit partial coherence, which would imply a level of organization not seen in random thermal emissions.
Coherent photons can carry relational information, meaning they can encode patterns that depend on the phase relationships between multiple light waves. In a neural context, coherent emissions could enable “holographic” processing—where information about the whole system is distributed throughout its parts, much like in holographic images. This is particularly relevant to theories of consciousness that emphasize non-locality and integration.
If coherence is present in the body’s photon field, then the nervous system could be leveraging quantum-like effects to achieve synchronization across distant regions without direct wiring. This would reduce the need for dense physical connections and could explain the brain’s efficiency in integrating diverse inputs into unified conscious experience.
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5. From Brain to Body-Wide Light Field
Although neurons are prolific photon emitters, they are not the only contributors to the body’s light emissions. Skin cells, immune cells, muscle fibers, and even circulating blood cells all emit ultraweak photons. These emissions can vary with circadian rhythms, stress levels, and disease states, suggesting they are responsive to physiological and environmental changes.
This raises the possibility that the human body maintains a distributed photonic field, a network of light-based signals that complements the traditional electrical and chemical networks. Such a system could facilitate instantaneous communication between distant organs, coordinate immune responses, and synchronize hormonal cycles without relying solely on slower signaling mechanisms.
Neurons, as the brightest and most precisely timed emitters, may act as central nodes in this body-wide field, setting the rhythm or phase for other cells. In this model, the brain is not the sole seat of consciousness or control but rather the central hub of a vast luminous network that extends to every corner of the body.
Chronological bibliography (selected experiments & research, 1800s → 2020s)
1800s — classical observations & biochemical mechanism of bioluminescence
Dubois, R. (1887). [Studies on luciferin and luciferase].
Annotation: Raphael Dubois isolated the two components (luciferin, luciferase) underpinning enzymatic bioluminescence — the biochemical foundation for animal light.
Harvey, E. N. (1920). The Nature of Animal Light (monograph).
Annotation: A foundational synthesis of animal bioluminescence observations and experiments up to early 20ᵗʰ century.
(Background review) — Bioluminescence: the First 3000 Years (review).
Annotation: historical review covering earliest experiments and 19ᵗʰ‑century work.
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Early 1900s — mitogenetic radiation (Gurwitsch) and initial photon‑based hypotheses
Gurwitsch, A. G. (1923). Mitogenetic radiation experiments (onion root).
Annotation: Classic “mitogenetic radiation” experiments — onion root tips purportedly stimulated mitosis in adjacent roots via a UV field (the origin of the term and experimental program). See modern re‑examinations and historical reviews.
(Review) Gurwitsch, A. A. (1988). A historical review of the problem of mitogenetic radiation. Experientia.
Annotation: historical summary of early mitogenetic experiments and the experimental controversies.
Mid 1900s — replication attempts, plant seedling UPE measurements
Colli, L., & Facchini, U. (1954). Light emission by germinating plants. Il Nuovo Cimento, 12, 150–153.
Colli, L., Facchini, U., Guidotti, G., Dugnani Lonati, R., Orsenigo, M., & Sommariva, O. (1955). Further measurements on the bioluminescence of the seedlings. Experientia, 11, 479–481.
Annotation: Mid‑century experimental measurements of ultraweak emissions from seedlings and plants — often cited as the re‑start of systematic UPE research.
Strehler, B., & Arnold, W. (1951). Light production by green plants. J. Gen. Physiol. (historical experimental notes).
1970s–2000s — Popp, development of “biophoton” concept, methodologies and claims of coherence
Popp, F.-A. (1979–2003, assorted papers and monographs).
Popp, F.-A., Chang, J.-J., Fisch, J., (eds.). (1998). Biophotons (book). Springer.
Annotation: Fritz‑Albert Popp revived and expanded the “biophoton” concept, argued for coherence and informational roles of UPE, and published both experimental studies and theoretical proposals. Popp’s work restarted and popularized the modern field of biophotonics.
(Perspective) “Biophoton emission: experimental background and theoretical approaches.” — World Scientific / review chapters summarizing experimental work and theories (1990s).
1980s–2000s — systematic measurements, spectral studies, and yeast/plant models
Quickenden, T. I., Tilbury, R. N., & coauthors (1980s–1990s). Growth‑dependent luminescence; spectral UPE from yeast and microorganisms. Photochem. Photobiol. (series of experiments).
Annotation: detailed spectral and growth‑phase UPE studies in yeast and microorganisms; attempts to reproduce mitogenetic stimulations with controlled UV doses.
Additional experimental studies on human tissue, hand emission and factors affecting UPE (e.g., Nakamura & Hiramatsu 2005; studies of temperature/oxygen effects).
2000s–2010s — systematic reviews, improved instrumentation, and renewed experiments
Ives, J. A., van Wijk, E. P. A., Bat, N., Crawford, C., Walter, A., Jonas, W. B., et al. (2014). Ultraweak Photon Emission as a Non‑Invasive Health Assessment: A Systematic Review. PLoS ONE, 9(2), e87401.
Annotation: systematic review of human UPE studies (search to 2011), assessing reproducibility, measurement quality, and clinical claims.
Frontiers review — Revisiting the mitogenetic effect of ultra‑weak photon emission (2015).
Annotation: critical re‑examination of Gurwitsch’s claims and modern experimental context; discusses replication attempts and required experimental conditions.
Integrative methods & mitochondria focus: Integrating Ultra‑Weak Photon Emission Analysis in Mitochondrial Research (Frontiers, 2020).
Annotation: modern attempts to link UPE to mitochondrial metabolism and ROS generation, methodological recommendations.
2010s–2020s — imaging, human UPE mapping, links to oxidative stress, and body‑wide measurements
Tsuchida, K., Iwasa, T., Kobayashi, M. (2019). Imaging of ultraweak photon emission for evaluating the oxidative stress of human skin. (Journal of Photochemistry & Photobiology).
Annotation: imaging UPE from human skin and exploring correlations with oxidative stress / physiology.
Nakamura, K., & Hiramatsu, M. (2005). Ultra‑weak photon emission from human hand: influence of temperature and oxygen concentration on emission. Journal of Photochemistry and Photobiology B.
Recent reviews and experimental summaries (2023–2024) that consolidate evidence for UPE in bacteria, fungi, seeds, plants, animals and humans, and discuss possible biological roles and mechanisms.
Recent theoretical work and quantum/optical hypotheses relevant to neurons & body‑wide fields
Rahnama, M., Bokkon, I., Tuszyński, J., Cifra, M., Sardar, P., & Salari, V. (2010). Emission of mitochondrial biophotons and their effect on electrical activity of membrane via microtubules. arXiv preprint.
Annotation: proposes mitochondrial biophotons interacting with microtubules and electrical activity — a theoretical mechanism linking UPE and neuronal function.
Zarkeshian, P., Kergan, T., Ghobadi, R., Nicola, W., & Simon, C. (2022). Photons guided by axons may enable backpropagation‑based learning in the brain. arXiv preprint (and later expansions 2025).
Annotation: theoretical models where axons guide photons for error‑signal feedback (photonic channels for learning).
Liu, Z., Chen, Y.-C., & Ao, P. (2024). Entangled biphoton generation in myelin sheath (arXiv).
Annotation: speculative paper proposing the myelin sheath could support quantum‑optical effects (entangled photon generation).
Broad, recent reviews and summaries (useful starting points)
Biophotons (Chang, Fisch, & Popp, eds., 1998) — book covering experiments, theory, and methods.
Ultra‑weak photon emission — a brief review (recent PMC review, 2024) — modern synthesis of UPE literature, mechanisms, and open questions.
Representative experimental landmarks (short timeline)
1800s: natural history & biochemical identification of luciferin/luciferase (Dubois).
1923: Gurwitsch’s onion root mitogenetic radiation experiments (claiming UV‑mediated mitotic stimulation).
1954–1955: Colli & Facchini measure weak photon emissions from seedlings (systematic plant UPE).
1970s–1990s: Popp and colleagues articulate the “biophoton” concept and report coherence/delayed luminescence phenomena.
1980s–2000s: Quickenden and others measure UPE spectra from yeast and microorganisms; attempts to replicate mitogenetic effects in controlled settings.
2000s–2020s: modern imaging (CCD/PMT) of human and animal UPE, systematic reviews, links to oxidative metabolism/ROS, mitochondrial hypotheses.
2010s–2020s: theoretical proposals linking biophotons to neuronal computation, coherence, microtubule interactions, and photonic guidance in axons.
Notes on quality, reproducibility, and controversies
Many early experiments (Gurwitsch, early mitogenetic studies) were controversial and difficult to reproduce under strictly controlled conditions; modern re‑evaluations find mixed reproducibility and highlight the need for rigorous shielding, spectral analysis, and avoidance of stray light.
Popp’s coherence claims are influential but debated: modern spectral and temporal studies sometimes support structured delayed luminescence, yet claims of long‑range coherent laser‑like fields in tissue remain contentious and require stronger experimental evidence.
Contemporary research tends to frame UPE as a measurable marker of oxidative metabolism / ROS and delayed luminescence phenomena rather than definitive evidence of a high‑bandwidth neuronal photonic signaling network; that said, newer theoretical models and high‑sensitivity imaging renew interest in functional roles.
Historical & Gurwitsch
re‑examinations: Frontiers — Revisiting the mitogenetic effect of ultra‑weak photon emission (PMC).
Colli & Facchini (1955) — Experientia (DOI listing).
Popp / Biophotons book (1998) and related review chapters.
Systematic review of human UPE: Ives et al., PLoS ONE (2014).
Modern reviews & Frontiers 2024 UPE review.
Quickenden / yeast & microorganism spectral measurements.
Theoretical/arXiv works by Rahnama et al., Zarkeshian et al., Liu et al. (2010–2024).
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