The proposed revision of SI units would embed Planck?s constant into the definition of the kilogram, as a fixed constant of nature. Traditionally, Planck?s constant is not readily interpreted as the size of something physical, and it is generally only encountered by students in the mathematics of quantum physics. Richard Feynman?s path integral formulation of quantum mechanics allows a neat visualization of the constant as the circumference of a surveyor?s wheel for measuring action along each path, making Planck?s constant a natural yardstick, almost literally. This approach is shown to have other benefits in the presentation of other basic quantum phenomena.
The proposed revision of SI units would embed Planck?s constant into the definition of the kilogram, as a fixed constant of nature. Traditionally, Planck?s constant is not readily interpreted as the size of something physical, and it is generally only encountered by students in the mathematics of quantum physics. Richard Feynman?s path integral formulation of quantum mechanics allows a neat visualization of the constant as the circumference of a surveyor?s wheel for measuring action along each path, making Planck?s constant a natural yardstick, almost literally. This approach is shown to have other benefits in the presentation of other basic quantum phenomena.
This paper presents a Coherence Geometry interpretation of Planck’s constant as a natural action scale arising from phase closure in structured coherence fields. Planck’s constant is traditionally introduced as an empirical constant. In this paper, a natural coherence action scale S0 arises from the requirement that stable μ-field structures close phase cycles in integral multiples of 2π. This quantizes action increments as S=2πnS0. The standard quantum relations follow once S0 is calibrated to laboratory data, yielding S0=ℏ. The result is structural rather than numerological: the paper does not claim to derive the measured numerical value of h without calibration. Instead, it argues that an action scale of the Planck type appears naturally from phase-constrained coherence geometry, with numerical value fixed by physical units and experimental comparison. Internal reference: CGI-RSR-000020.
Planck's constant h is considered to be a fundamental Universal constant of Physics. And although we can experimentally determine its value to great precision, the reason for its existence and what it really means is still a mystery. Quantum Mechanics has adapted it in its mathematical formalism, as it also has the Quantum Hypothesis. But QM does not explain its meaning or prove its existence. Why does the Universe need h and energy quanta? Why does the mathematical formalism of QM so accurately reflect physical phenomena and predict these with great precision? Ask any physicists and uniformly the answer is that's how the Universe works. The units of h are in energy-time and the conventional interpretation of h is as a quantum of action. But in this brief note we take a different view. We interpret h as the minimal accumulation of energy that can be manifested in our measurements. Certainly the units of h agree with such interpretation. Based on this we provide a plausible explanation for the existence of Planck's constant, what it means and how it comes about. We show that the existence of Planck's constant is not so much dictated by the Universe but rather by Mathematics and the inner consistence and calibrations of Physics.
The International System of Units (SI) is the world's most widely used system of measurement, used every day in commerce and science, and is the modern form of the metric system. It currently comprises the meter (m), the kilogram (kg), the second (s), the ampere (A), the kelvin (K), the candela (cd) and the mole (mol)). The system is changing though, units and unit definitions are modified through international agreements as the technology of measurement progresses, and as the precision of measurements improves. The SI is now being redefined based on constants of nature and their realization by quantum standards. Therefore, the underlying physics and technologies will receive increasing interest, and not only in the metrology community but in all fields of science. This book introduces and explains the applications of modern physics concepts to metrology, the science and the applications of measurements. A special focus is made on the use of quantum standards for the realization of the forthcoming new SI (the international system of units). The basic physical phenomena are introduced on a level which provides comprehensive information for the experienced reader but also provides a guide for a more intense study of these phenomena for students.
I present a perspective in which the mathematical constant π, traditionally considered a mere geometric ratio of a circle’s circumference to its diameter, emerges as a fundamental invariant in quantum physics. While π has long been recognized for its central role in mathematics and classical physics—appearing in trigonometry, wave phenomena, harmonic oscillators, and statistical distributions—its ubiquity in the quantum domain reveals a deeper structural significance. In this work, I demonstrate that π is indispensable for the normalization of quantum wavefunctions, appearing naturally in Gaussian integrals, and is equally essential in Fourier transforms, ensuring the unitarity of transformations between conjugate variables such as position and momentum. Beyond these mathematical appearances, π is embedded in the very definition of Planck’s reduced constant (ħ = h / 2π), suggesting that it underlies the quantization of action and the discrete structure of phase space. By framing π as a quantum invariant, I argue that it is not merely an artifact of geometry or algebra but a universal constant that governs coherence, symmetry, and continuity in physical systems. Its recurring presence in quantum statistics, probability distributions, and density-of-states calculations indicates that π plays a central role in maintaining internal consistency within the quantum framework. This article inaugurates a series aimed at exploring π as a fundamental building block of quantum reality, bridging concepts from classical physics, quantum mechanics, and statistical theory. By revealing π as a structural constant rather than a mathematical convenience, I offer new perspectives on the underlying architecture of nature, with implications ranging from fundamental theory and quantum computation to cosmology and the interpretation of physical laws.
WHAT TO LOOK FOR Although the classical theory developed in Chapter 2 can be used to describe a great many phenomena in the real world, there is little doubt that the proper description of the world is quantum. To a large measure we perceive the world classically and we must find ways to uncover the underlying quantum theory. The process of “quantization” normally consists of turning a classical theory into a corresponding quantum theory. In turn, the “classical limit” is the process by which a quantum theory is brought to its associated classical theory. The parameter ħ = 1.0545 × 10 −27 (≃ 10 −27 ) erg-seconds (cgs units), referred to as Planck's constant, sets the scale of quantum phenomena. In many applications it will prove useful to use “natural” units in which ħ = 1 just so that formulas are less cumbersome. For most typical formulations of quantum mechanics the classical limit means the limit that ħ → 0, and in this text we shall have many occasions to use this definition as well. In addition, we shall also learn to speak about the classical and quantum theories simultaneously coexisting – as they do in the real world – without the need to take the limit ħ → 0. There are three generally accepted “royal” routes to quantization, due principally to Heisenberg, Schrödinger, and Feynman, respectively, and we shall exploit them all. In each case we begin with a single degree of freedom ( N = 1).
Planck introduced the constant ℎ as the elementary quantum of action, yet its repeatedappearance throughout quantum physics remains one of the deepest structural features ofmodern science. The same constant governs photon energy, matter waves, Schrödingerevolution, angular momentum quantization, and Heisenberg uncertainty. This paperproposes a Space-Phase (SP3) interpretation in which Planck's constant is not primarily aproperty of matter or radiation but an intrinsic action scale of an underlying conditionablemedium.The medium is modeled conceptually as a flexible, interconnected Planck-scale meshcapable of storing, releasing, and transporting energy through localized reorganizationevents. Stable particles correspond to persistent conditioned basins within this mesh,while propagating radiation represents traveling reorganizations of the same medium. Agroove-based analogy is introduced in which observable physical change requires themedium to reorganize by at least one elementary unit of action. The uncertainty relationsare interpreted as minimum reorganization criteria rather than solely mathematical limitsarising from wavefunctions. Planck's relation, de Broglie's relation, Schrödinger's equation,and Heisenberg's uncertainty principle are mapped to this common organizing principle.The paper presents a qualitative framework intended to motivate future mathematicaldevelopment of an SP3 description of quantum action