Quantum Biology, Light, & Living Organisms

What Is Quantum Biology?

Quantum biology is an emerging scientific field that studies the role of quantum mechanics—the physics of particles at the atomic and subatomic levels—in living organisms. It explores how biological processes rely on phenomena like quantum tunneling and coherence, rather than just classical physics and standard chemistry.

Researchers focus on a variety of specific biological processes that cannot be completely explained by classical science:

• Photosynthesis: When plants absorb sunlight, they transfer that energy to reaction centers with near 100% efficiency. Quantum biology suggests that the absorbed energy takes multiple pathways simultaneously (via quantum superposition) to find the most efficient route.
• Bird Navigation: Migratory birds like the European Robin can detect the Earth’s weak magnetic field to navigate. Scientists believe this “biological compass” is driven by a quantum mechanism inside the bird’s eye involving entangled electrons.
• Enzyme Activity: Enzymes are proteins that speed up chemical reactions in the body. In some enzyme-catalyzed reactions, scientists have observed particles like protons “tunneling” through physical energy barriers rather than going over them.
• Sense of Smell: There is ongoing research into how we detect odors, with some theories proposing that our olfactory receptors identify molecules not just by their physical shape, but by the vibrational frequencies of their quantum bonds.

While the field is respected and actively investigated by major research institutions, including ivy league universities, there is still healthy skepticism and debate. The scientific consensus is that while quantum phenomena like tunneling and coherence happen in biological molecules, researchers are still gathering definitive proof that single living cells maintain these delicate states on a massive scale without losing them to environmental “noise”. Because it sits at a complex intersection, quantum biology requires continuous collaboration between physicists, biologists, and chemists.

Quantum Biology To Explain Impacts Of Light On Living Organisms

Quantum Biology can help explain how biological molecules capture, transfer, and process photons using the physics of subatomic particles rather than standard chemistry.

Because light is fundamentally a stream of quantum particles (photons), the primary biological sensors that interact with it have evolved highly specialized quantum mechanisms. Quantum biology explains this interaction through several major phenomena:

Near-Perfect Energy Transfer in Photosynthesis

When a photon hits a leaf, it excites an electron in a light-harvesting protein, creating a packet of energy called an exciton. This exciton must travel to a reaction center to be converted into chemical energy. Under classical physics, this energy would randomly bounce around, losing a massive amount of heat. Instead, plants use quantum coherence. The exciton exists in a state of superposition—effectively traveling down multiple pathways at the exact same time—allowing it to automatically find the most efficient route. This gives the primary stages of photosynthesis an unrivaled energy efficiency near 100%.

Radical Pairs, Blue Light, and Magnetoreception

Migratory animals use light to activate a biological compass that detects the Earth’s magnetic field. This process is mediated by cryptochromes, which are light-sensitive proteins found in the eyes of birds and the cells of many plants and animals. When a photon of blue light strikes a cryptochrome protein, it moves an electron and creates a “radical pair”—two highly reactive molecules with entangled electrons. The spin state of these entangled electrons is incredibly sensitive to external magnetic fields. The alignment of the Earth’s field shifts the chemical outcome of this reaction, letting the organism “see” or feel magnetic north.

Circadian Rhythms and Cellular Signaling

Light is the primary environmental cue that controls the biological clocks (circadian rhythms) of almost all living things. Cryptochromes do not just assist with navigation; they are also central drivers of the internal clock. Recent research on The Quantum Biology of Light suggests that when cryptochromes absorb blue light, quantum tunneling effects help generate controlled bursts of Reactive Oxygen Species (ROS). These ROS act as vital quantum signaling messengers that tell a cell’s DNA to alter gene expression, shifting the body’s metabolism from night to day.

Human Vision Sensitivity

Human eyes are capable of detecting fields of color and light even down to a single photon. The moment light strikes the retina, it interacts with a light-absorbing molecule called retinal. The molecule absorbs the photon and undergoes a rapid structural change (isomerization) to send an electrical signal to the brain. According to Vision Sciences research, this shape-change happens faster than classical molecular motion should allow. It relies on a quantum transition pathway where the molecule momentarily occupies a shared superposition of shapes before finalizing its structural change.

Photobiomodulation (Red and Infrared Light Therapy)

When human tissue is exposed to red or near-infrared light, it triggers cellular healing, a practice used in medical treatments called photobiomodulation. This therapy relies on a specific enzyme inside our mitochondria called cytochrome c oxidase. When photons in the red spectrum hit this enzyme, they change the quantum electron transport dynamics inside the cell’s powerhouse. By accelerating electron transfer rates via quantum tunneling, the enzyme clears blockages, boosts ATP (energy) production, reduces oxidative stress, and actively promotes cellular repair.

Expect to hear about more quantum biology explanations of light’s impact on living organisms.

Image above: Pexels.com

David Shiller

David Shiller is the Publisher of LightNOW, and Senior Business Development Consultant at Capacity Consulting, a North American consulting firm providing business development services to advanced lighting manufacturers. The ALA awarded David the Pillar of the Industry Award. David has been co-chair of the ALA’s Engineering Committee since 2010. David established MaxLite’s OEM component sales into a multi-million dollar division. He invented GU24 lamps while leading ENERGY STAR lighting programs for the US EPA. David has been published in leading lighting publications, including LD+A, enLIGHTenment Magazine, LEDs Magazine, and more.

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