Despite the impressive advances in biological imaging, no imaging modality today generates, in a comprehensive manner, high-resolution images of crowded molecules working deep inside the living cell in real time. In this paper, instead of tackling this engineering problem in the hope of solving it, we ask a converse question: What if such imaging is \emph{fundamentally} impossible? We argue that certain decoherence processes could be suppressed because the internal workings of the cell are not being closely "observed" in the quantum mechanical sense, as implied by the assumed impossibility of imaging. It is certainly true that the "wet and warm" living cell should not exhibit quantum behavior merely because of the lack of observation. Despite this, we plow ahead to see what \emph{might} result from such absence of the outward flow of information. We suggest that chaotic dynamics in the cell could be quantum mechanically suppressed --- a known phenomenon in quantum chaology, which is potentially resistant to various mechanisms for the emergence of classicality. We also consider places where experimental evidence for/against such a possibility may be sought.
Despite the impressive advances in biological imaging, no imaging modality today generates, in a comprehensive manner, high-resolution images of crowded molecules working deep inside the living cell in real time. In this paper, instead of tackling this engineering problem in the hope of solving it, we ask a converse question: What if such imaging is \emph{fundamentally} impossible? We argue that certain decoherence processes could be suppressed because the internal workings of the cell are not being closely "observed" in the quantum mechanical sense, as implied by the assumed impossibility of imaging. It is certainly true that the "wet and warm" living cell should not exhibit quantum behavior merely because of the lack of observation. Despite this, we plow ahead to see what \emph{might} result from such absence of the outward flow of information. We suggest that chaotic dynamics in the cell could be quantum mechanically suppressed --- a known phenomenon in quantum chaology, which is potentially resistant to various mechanisms for the emergence of classicality. We also consider places where experimental evidence for/against such a possibility may be sought.
• A Perspective paper published in PNAS presents the scope and future research directions of quantum biology. • Focuses on quantum coherence and synchronization at macroscopic scales, rather than simply being a collection of unexplained phenomena. • Proposes three core open questions: the development of quantum probes, quantum-like classical systems, and the macroscopic amplification of microscopic quantum effects. [Quantum Biology Society] Generally, the "warm, wet, and noisy" environment that makes up living organisms is considered the most hostile condition for true quantum effects like entanglement or coherence to exist. However, elucidating how living organisms overcome these paradoxical limitations and utilize unique quantum wave-like properties for functional advantages is the very core of "quantum biology." Recently, a Perspective paper titled "What is quantum biology?" was published in the Proceedings of the National Academy of Sciences (PNAS), drawing the attention of the academic community. A research team including Gregory D. Scholes and Graham R. Fleming clearly declared that quantum biology is not simply a "grab bag of biological phenomena that cannot be fully explained quantitatively by current science." ■ 'Coherence' and 'Synchronization' Governing Life Phenomena The paper reviews existing representative studies, such as exciton spreading in photosynthesis and avian navigation (magnetic field sensing), focusing on the "coherence" and "resonance" phenomena occurring in vivo. According to the researchers, the evolutionary process finely tuned the local protein environments of chromophores to closely match electronic and vibrational energy gaps. This optimization of frequency resonance is strong evidence that living organisms actively utilize quantum mechanical entanglement and wave properties to gain macroscopic physiological advantages. Furthermore, they explained that noise does not merely act as a destructive factor that collapses quantum states; rather, it can play a beneficial role in amplifying minute quantum signals and assisting transport through "stochastic resonance" or "quantum ratchet" mechanisms. ■ 3 Core Open Questions for the Future of Quantum Biology The researchers proposed three core open questions that must be resolved to firmly establish quantum biology as an independent discipline and focus future research agendas. 1. Development of quantum probes: Measurement technologies called "quantum probes" are needed to clearly and sharply reveal the quantum functions hidden within complex biological systems. 2. Identification of quantum-like systems: It must be determined whether classical biological machineries have the potential to exhibit useful properties as if possessing a "quantum advantage" simply by mimicking quantum systems. 3. Amplification to the macroscopic scale: We must understand the missing link of how microscopic-scale quantum mechanical mechanisms are amplified to the biological scale, providing the foundation for new macroscopic functions. This paper clearly redefined the scope of quantum biology into categories including: ▲ interactions with fields such as light, magnetic, and electric fields; ▲ various forms of coherence phenomena; ▲ microscopic quantum dynamical systems including spin and proton tunneling; and ▲ complex systems that mimic quantum phenomena through networks. Experts anticipate that this study will serve as an important compass for future quantum biology research, going beyond merely confirming the physical laws of the microscopic world to asking how living organisms control and optimize quantum phenomena in macroscopic environments.
This analysis addresses the critical decoherence paradox in quantum biology, where observed microsecond coherence times in living cells vastly exceed the nanosecond predictions of standard open quantum systems theory. The study synthesizes theoretical and empirical advancements, establishing that the information geometry of biological macromolecules provides the mechanism for long-lived quantum states, where cellular structures function as optimized topological constraints that actively harness environmental noise. Key theoretical frameworks integrated include the Quantum Fisher Information (QFI) metric, which quantifies biological coherence and sets absolute limits on sensory precision (e.g., avian magnetoreception), and the Entanglement-Weighted Operator Geometry (EWOG). EWOG is empirically validated to resolve the decoherence discrepancy by demonstrating that quantum entanglement dynamically modifies the effective Hamiltonian, achieving a calculated 58% suppression of decoherence in proteins like MagLOV2. Furthermore, the study applies Quantum Geometrical Molecular Dynamics (QGMD) to show that the non-Abelian quantum geometric tensor drives nonadiabatic enzymatic catalysis, enabling quantum mechanical tunneling to provide profound energetic advantages, such as reducing the required energy for proton transport in mitochondrial Complex I by over 55%. Also available on Academia.edu: https://www.academia.edu/attachments/132032425/download_file?s=portfolio
Abstract The lines separating Biology and Physics have started to blur in recent decades, leading to the emergence of the interdisciplinary field known as quantum Biology. This field looks into the possibility that basic quantum mechanical phenomena such as coherence, entanglement, tunneling, and superposition play crucial roles in biological processes that are beyond the scope of classical Physics. Biology has traditionally worked within the parameters of classical mechanics, presuming that delicate quantum effects cannot endure in the warm, humid, and cacophonous environments of living systems. But new findings in fields like photosynthesis, olfaction, avian magnetoreception, and enzyme catalysis indicate otherwise, suggesting that living things intentionally and possibly advantageously use quantum principles. From the earliest speculative theories to the most recent experimental confirmations, this book chapter methodically examines the evolution of quantum Biology. We investigate how the exceptionally high energy transfer efficiency in photosynthetic complexes particularly in the light-harvesting proteins of green sulfur bacteria and plants is supported by quantum coherence. The remarkable speed of proton transfers and enzymatic reactions during DNA replication is also investigated in relation to quantum tunneling. The chapter explores magnetoreception in migratory birds and suggests models in which sensitivity to Earth's geomagnetic field is made possible by radical pair mechanisms influenced by quantum entanglement. We also discuss the intriguing but controversial idea that quantum vibrations improve the human olfactory system's capacity for discrimination. In addition to examining particular occurrences, this research challenges more general theoretical models that seek to balance quantum mechanics with the decoherence commonly observed in biological settings. Recent developments in quantum information theory, biomimetic quantum technologies, and ultrafast spectroscopy are highlighted as essential instruments advancing empirical research. We also critically evaluate the field's methodological difficulties, the skepticism of overly optimistic interpretations, and the significant philosophical ramifications of acknowledging life as a quantum phenomenon. In conclusion, quantum Biology suggests that quantum effects are not uncommon aberrations but rather are an essential part of life, offering not only a fresh perspective for reinterpreting well-known biological processes but also the potential for a fundamental paradigm shift. Quantum biology has the potential to completely transform biotechnology, medicine, and our comprehension of consciousness and the origin of life as experimental methods advance. This chapter highlights the significance of interdisciplinary cooperation in order to completely comprehend the latest discoveries and possible future paths of quantum Biology, highlighting its revolutionary influence on our comprehension of life at the most basic levels. Key words: Quantum Biology, tunneling, avian magnetoreception, enzyme catalysis
The smallest details of living systems are molecular devices that operate between the classical and quantum levels, i.e. between the potential dimension (microscale) and the actual three-dimensional space (macroscale). They realize non-demolition quantum measurements in which time appears as a mesoscale dimension separating contradictory statements in the course of actualization. These smaller devices form larger devices (macromolecular complexes), up to living body. The quantum device possesses its own potential internal quantum state (IQS), which is maintained for prolonged time via error-correction being a reflection over this state. Decoherence-free IQS can exhibit itself by a creative generation of iteration limits in the real world. To avoid a collapse of the quantum information in the process of correcting errors, it is possible to make a partial measurement that extracts only the error-information and leaves the encoded state untouched. In natural quantum computers, which are living systems, the error-correction is internal. It is a result of reflection, given as a sort of a subjective process allotting optimal limits of iteration. The IQS resembles the properties of a quasi-particle, which interacts with the surround, applying decoherence commands to it. In this framework, enzymes are molecular automata of the extremal quantum computer, the set of which maintains stable highly ordered coherent state, and genome represents a concatenation of error-correcting codes into a single reflective set. Biological systems, being autopoietic in physical space, control quantum measurements in the physical universe. The biological evolution is really a functional evolution of measurement constraints in which limits of iteration are established possessing criteria of perfection and having selective values.
The performance of biological sensory systems is shown to reach the quantum limits to measurement, this being true in spite of the high levels of thermal noise associated with operation at physiological temperatures.Theoretical issues associated with quantum-limited measurement at high temperatures are addressed and strategies for such measurements which make use of active filtering are formulated.Experimental and theoretical evidence supporting the existence of active filters in the sensors of the inner ear is discussed.Quantum-limited measurement requires that the internal dynamics of the primary sensory amplifier have a quantum mechanical "phase-memory" comparable to the time scale of the measurement, on the order of milliseconds for biological sensors.This millisecond coherence time invalidates conventional (and semi-classical) descriptions of biological systems in terms of chemical kinetics, and demands an analysis of quantum effects in molecular dynamics.Simple model Hamiltonians are formulated which seem to describe the dynamics of biological molecules and field-theoretic techniques are developed to solve these --2 --Hamiltonians in a variety of parameter regimes.Conditions for non-trivial quantum effects in these models are compared with experiments on the primary events of photosynthesis and the low-temperature behavior of heme proteins.Predicted quantum effects are observed and independent observations support the assignment of parameters outside the regime where semi-classical approximations are valid.The same model Hamiltonians predict that molecular vibrations exhibit a superradiant instability in polymers where each subunit catalyzes a chemical reaction of sufficient speed.This instability results in macroscopic quantum coherence of the sort required to account for quantum-limited measurement in the sensory systems.Such "phonon super-radiance" provides a natural mechanism of amplification and active filtering, several features of which are irt accord with experiments in the sensory receptors of the inner ear.In each case considered, theoretical analysis demonstrates that quantum effects in biology are significant if not dominant, and this leads to fundamentally new intepretations of several biological processes.Detailed experiments are proposed which will provide quantitative tests of these new interpretations.vii B. Further comments on photon counting ...
• A technical monograph on quantum biology, synthesizing an extensive 161 pages and 1,754 references, has been published on the arXiv repository. • Establishes a unified theoretical framework based on 'open quantum systems' for fragmented quantum biology research, including exciton coherence in photosynthesis, biological electron transfer, and microtubule vibrations. • Connects microscopic quantum phenomena with macroscopic biological processes, providing an essential and comprehensive guide for the future development of nanomedicine and innovative biotechnology. [Quantum Biology Society] A technical monograph perfectly synthesizing the vast history and physical principles of Quantum Biology, which investigates the origins of life phenomena from a quantum mechanical perspective, has been published, drawing significant attention from the academic community. Recently, "Physical Principles of Quantum Biology," co-authored by Dr. Nathan S. Babcock and Brandy N. Babcock, was released on the preprint repository arXiv. This document, the result of analyzing 1,754 cited references over 161 pages, provides a fundamental and unified foundation for quantum biology to move beyond fragmented curiosity and establish itself as a firm modern scientific discipline. ■ A 'Unified Framework' Binding Fragmented Research Together Until now, individual research in quantum biology has exploded across various topics, such as exciton coherence in photosynthesis, magnetic field sensing in birds (radical pair mechanism), ultraweak photon emission, and quantum vibrations in microtubules. However, the academic barrier to entry was high due to the lack of a unified theoretical framework or textbook penetrating the entire field, and there was no clear consensus even among researchers regarding the academic scope of quantum biology. To solve this problem, this monograph deeply illuminated living organisms as 'open quantum systems' that constantly exchange energy and information with their environment. It presents a new physical framework that goes beyond the limitations of conventional closed and isolated quantum mechanics. In particular, moving past phenomena based on simple electrostatic models, it strictly classified and defined how the non-trivial quantum coherence and entanglement of biomolecules enable the dynamical functions of life. ■ A New Horizon for Disease Treatment and Nanomedicine The latter half of the book intensively explores how these quantum biological principles can be practically applied to medicine and biotechnology in the future. The researchers conducted an in-depth analysis of quantum spin control of intracellular mitochondria and reactive oxygen species (ROS), as well as cell signaling systems utilizing the optical and electromagnetic vibrations of microtubules. Based on this, they covered a wide range of clinical and technological possibilities leading to photodynamic therapy, electromagnetic field therapy, and regenerative medicine of cells and tissues. The fact that living organisms do not lose quantum effects even in so-called warm, wet, and noisy harsh environments, but rather actively utilize them to achieve high-efficiency information processing and energy conversion, provides crucial inspiration for designing artificial photosynthetic devices, quantum sensors, and nano-bio hybrid materials in the future. Through this literature, the authors define that 'quantum biology goes beyond the limits of isolated quantum systems to ask how life phenomena ultimately operate in complex environments'. They emphasized that "it will be a key guide not only for academic researchers but also for medical technologists, biochemists, and physicists to rigorously understand the quantum foundation of life and develop it into practical nano-bio application technologies".