03.KO - Information Processing Is Subject to Physical Law

Domain: physics
Date: 2026-06-11

Claim: Every usable instance of information is represented by one or more physical systems. Storing, transmitting, copying, reading, erasing, or changing that information is therefore a physical process. Those processes are governed by the physical laws that apply to the carrier, the device, the surrounding environment, and the operation being performed.

Problem: Information may be treated as physical when energy or computer hardware is being discussed, then treated as if it has no physical constraints when the analysis moves to another field.

Why this is a problem: A physical information process does not become exempt from physical law because it is described at an informational level. If an analysis claims that a physical constraint does not apply, it must explain why.

This rule does not mean that the represented content automatically has every property of its carrier. A written sentence does not acquire the mass of its ink as a property of its meaning. Claims that information itself has a topology, is conserved, or is affected by gravity require separate arguments. Each argument must identify the relevant system, define the property, and show that the property remains meaningful when the information is represented in another way.

Why it matters: This note separates two questions that are often combined:

1. Is an information process physically implemented and constrained? Yes.
2. Does a particular physical property also describe the information across different representations? That must be shown separately for each property.

This distinction keeps later claims testable. It prevents information processing from being treated as law-free while also preventing the properties of a carrier from being assigned automatically to the content it represents.

Plain summary: Physical information processing is subject to physical law. Further claims about the properties of information require their own evidence.

Authorship and evidence

• The no-exemption argument is Summer’s original analysis.
• Landauer supports the claim that information handling requires physical representation and is constrained by physical law.
• Bekenstein provides one example of a specific constraint: the maximum entropy—a measure related to how many microscopic arrangements fit the system’s overall state—and therefore the maximum information capacity of a bounded physical system depends on that system’s total energy and size. This does not establish that abstract information itself undergoes gravity.

Sources

• Rolf Landauer — The physical nature of information, Physics Letters A 217 (1996).
• Jacob Bekenstein — Universal upper bound on the entropy-to-energy ratio for bounded systems, Physical Review D 23 (1981): https://doi.org/10.1103/PhysRevD.23.287
• John A. Wheeler — Information, Physics, Quantum: The Search for Links (“It from Bit,” 1989): proposes the far stronger claim that physical reality itself arises from information. Cited as a bracket rather than as support: a published position goes much further than this note does. This note’s claim is the modest member of that family, and it deliberately does not adopt Wheeler’s inversion.

Related notes:
01.KO - Information is Physical