J. Rogers, SE Ohio
The paper with the full category framework is here.
What if everything we call a "fundamental constant" is actually just a conversion factor between arbitrary measurement axes?
A new paper argues that the physical constants we've spent centuries measuring—the speed of light c, Planck's constant h, Newton's gravitational constant G—aren't properties of the universe at all. They're properties of our description of the universe. And this isn't philosophy—it's a mathematical proof with a falsifiable prediction.
The Setup: One Thing, Many Measurements
Here's the core insight: when you measure an electron, you can describe it in multiple ways:
- Mass: 9.109 × 10⁻³¹ kg
- Energy: 8.187 × 10⁻¹⁴ J
- Frequency: 1.236 × 10²⁰ Hz
- Wavelength: 2.426 × 10⁻¹² m
We typically think of these as four different properties that happen to be related by physical laws: E = mc², E = hf, λ = h/mc. But what if that's backwards?
What if there's only one underlying thing—call it the substrate—and Mass, Energy, Frequency, and Wavelength are just four different ways of measuring it, like describing a location using latitude, longitude, altitude, or distance-from-Chicago?
When you insist on using multiple "independent" coordinate axes to describe a single unified thing, you're forced to introduce conversion factors between them. We call those conversion factors c, h, and G. But they're not measuring properties of nature—they're measuring how misaligned our coordinate system is from the substrate's natural geometry.
The Math Already Knew This
Here's what makes this framework so compelling: it uses exactly the same mathematics as standard physics, but interprets it geometrically rather than as a collection of separate facts.
Jacobians are the diagonals in a rotation matrix that convert between unit systems. We incorrectly called these jacobians "Planck units." But they are not a separate unit chart. They are not God's little rulers. The Planck jacobians rotate between the SI unit chart and the single set of natural ratios that exist as physical reality in a unified universe. Every unit chart has a set of jacobians that rotate to the same set of natural ratios.
Consider these relationships, all known for over a century:
- E = mc² (Einstein, 1905)
- E = hf (Planck, 1900)
- λ = h/mc (de Broglie, 1924)
- F = Gm₁m₂/r² (Newton, 1687)
Standard physics treats these as independent discoveries that happen to be consistent. But if you normalize everything by Planck-scale factors, something remarkable happens:
m/m_P = E/E_P = f·t_P = l_P/λ = T/T_P = p/p_P
Every fundamental quantity, when divided by its corresponding Planck jacobian, equals the same dimensionless number. One number. Not five different properties related by four laws—one substrate measured six different ways.
From this single equality, you can derive all 15 pairwise "laws" connecting mass, energy, frequency, temperature, momentum, and wavelength. Each law is just what you get when you solve for one variable in terms of another. The constants appear as the algebraic leftovers—the Jacobian factors needed to convert between misaligned coordinate axes.
The paper proves this isn't a numerical coincidence. The probability that 15+ independently discovered laws would align this perfectly by chance is less than 10⁻²².
The Conceptual Revolution
Standard Framework:
- The universe has properties: mass, energy, momentum, etc.
- These properties are related by laws: E = mc², F = ma, etc.
- The constants in these laws are fundamental parameters to be measured
- Understanding nature means discovering more laws and measuring constants to higher precision
This Framework:
- The universe has one unified substrate (mathematically: a terminal object)
- Mass, Energy, Time, etc. are measurement axes we impose (conceptually independent but not ontologically independent.)
- Physical "laws" are forced consistency conditions when you describe one thing through multiple fragmented axes.
- Constants are Jacobian transformation coefficients—they measure how far your coordinate system is displaced from the substrate's natural geometry. And this is already operationally true since the 2019 redefinition of constants.
- There exists exactly one natural coordinate system: dimensionless ratios where all units cancel.
The Falsifiable Claim: Natural Ratios
This isn't just mathematical philosophy. The framework makes a specific, testable prediction:
There exists a single, universal physical scale defined by dimensionless natural ratios, independent of any unit system.
When you form the ratios:
- m/m_P (mass divided by Planck mass)
- l_P/λ (Planck length divided by wavelength)
- f·t_P (frequency times Planck time)
These aren't "Planck units" (which is still a choice of coordinates). These are unit-free numbers—all the dimensions cancel. We are just cancelling out the unit scaling we arbitrarily added. The paper claims these dimensionless ratios converge to a single universal substrate value that is the same regardless of what you're measuring or what units you use.
Experimental test: If this is true, then any sufficiently precise measurement should reveal that all phenomena, when expressed as natural ratios, cluster around integer or simple fractional relationships to each other. The substrate has structure, and that structure should be visible in the dimensionless ratios.
If, instead, the constants really are independent fundamental parameters, then the natural ratios should show no particular pattern—they'd just be whatever values happen to make our arbitrary unit choices work out.
Why This Matters
1. It Explains Why Physics Works
Why can we describe the universe with mathematics at all? Standard answer: "The universe is mathematical" (Tegmark) or "It's just unreasonably effective" (Wigner).
This framework: Mathematics works because consistency is the only requirement. Once you choose to describe a coherent substrate through multiple fragmented axes, dimensional analysis, conservation laws, and "fundamental" relationships are unavoidable consequences. They're not features of the universe—they're features of any consistent description.
2. It Reframes the Search for Unification
Physics has spent a century trying to unify the four forces, reconcile quantum mechanics and relativity, and find a "theory of everything."
This framework suggests: The universe is already unified. The apparent multiplicity (different forces, different particles, different conservation laws) is an artifact of describing one substrate through multiple incompatible coordinate systems. We're not looking for unification—we're looking for the correct description of the substrate we fragmented.
3. It Reinterprets Constants
When we measure c to higher precision or wonder why the fine structure constant α ≈ 1/137, we're asking the wrong question.
The right question: What is the geometric structure of the substrate, and why does our particular choice of conceptual axes (Mass, Length, Time as independent) produce these specific Jacobian factors when we try to express that geometry?
The constants aren't parameters of nature. They're parameters of our perceptual fragmentation of nature.
The Newton Connection
Isaac Newton would have understood this immediately. The Principia is written in pure geometric ratios—areas swept out, distances traversed, forces compared. Newton proves the inverse-square law without ever assigning units or defining constants. The geometric relationships are primary; the constant G only appears when you try to express that geometry in specific measurement units.
Newton knew gravity wasn't "force equals G times stuff"—it was a geometric relationship between curvature and matter. The algebraic formulation came later, and with it, the illusion that G was a property of gravity rather than a property of our coordinate choice.
This paper is Newton's geometric physics, generalized to all of physics, and proven using category theory (specifically, Grothendieck fibrations—though the author discovered the structure before knowing that name).
The Bottom Line
We've been doing physics backwards. We thought:
- Measure constants precisely
- Discover new laws
- Unify the forces
- Understand why math works
This framework says:
- There is one substrate (terminal object)
- We fragmented it into "independent" conceptual axes (Mass, Length, Time)
- Constants are forced to appear as connection coefficients (Jacobians) making our fragmented description consistent
- Laws are forced as Cartesian liftings of substrate morphisms into coordinate systems
- Math works because consistency is the only requirement
The universe doesn't have multiple properties connected by laws. It has one thing. We invented the "multiple," and we're measuring the cost of that invention. The cost is precisely: c, h, G, k_B.
For the Technically Inclined
The paper models this using:
- 𝓑: Category of conceptual types (Mass, Energy, Time...) with dimensionless morphisms
- 𝓔: Category of measured quantities (values + units)
- π : 𝓔 → 𝓑: Grothendieck fibration projecting measurements onto conceptual types
- S_u: Terminal object in 𝓑 representing the unified substrate
Physical laws are Cartesian liftings of morphisms in 𝓑. Constants are cocycle data encoding the geometric distortion introduced by coordinate choices. The Planck scale is the unique inversion point where reciprocal scaling relationships (m/m_P vs l_P/λ) simultaneously equal unity.
Dimensional analysis (Buckingham π) and conservation laws (Noether's theorem) emerge as functorial consequences, not separate tools.
The radical claim: Physical constants aren't fundamental. Unit systems are not fundament. And there's exactly one system of dimensionless natural ratios—where the substrate reveals itself directly, with no conversion factors needed.
Everything else is just us, insisting on measuring one thing in dozens of different ways, and then marveling at how precisely the conversion factors work out.