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Main positions:Director, High Performance Computing Platform, PKU
Degree:Doctoral degree
Status:Employed
School/Department:Institute of Theoretical Physics

Lei Yian

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Education Level: Postgraduate (Doctoral)

Administrative Position: Associate Professor

Alma Mater: Peking University

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The Fundamental Distinction Between Natural Quantum Theory and Pseudoscientific Theories
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The Fundamental Distinction Between Natural Quantum Theory and Pseudoscientific Theories

The Core Characteristics of Pseudoscientific Theories

The fundamental operation of pseudoscientific theories is to change the rules of the game: either by introducing new foundational assumptions (such as new particles, new forces, or new principles), or by rejecting the mathematical structure or experimental basis of existing theories. In essence, they declare: "The existing theory is wrong; my new assumptions are correct." Moreover, such operations often violate basic scientific, logical, and philosophical principles without self-awareness—introducing unfalsifiable hypotheses, violating energy conservation, or ignoring dimensional consistency.

Natural Quantum Theory Operates in an Entirely Different Manner

NQT does none of the above. Its work can be summarized on six levels:

First, it re-examines the physical meaning of the mathematical formalism. The mathematical framework of quantum mechanics—the Dirac equation, angular momentum algebra, field-theoretic Lagrangians—is preserved in its entirety, without altering a single symbol. What NQT does is ask: what is the physical content of these mathematical structures? When the formalism yields J=L+SJ=L+S, the dimensional consistency and vector addition rules of this equation themselves declare that spin is a physical angular momentum. This is not an assumption of NQT; it is a logical requirement of the mathematical framework itself.

Second, it restores neglected but well-established physical facts. Thomas precession was not invented by NQT; it is a relativistic effect established as early as 1926. The ontological status of fields is not an assumption of NQT; it is a basic premise of field theory. The halving of the magnetic moment is not a prediction of NQT; it is a direct experimental observation from the Zeeman effect. NQT merely identifies the overlooked logical connections among these known facts.

Third, it traces the physical content lost during the process of conceptual abstraction. The claim that "spin is intrinsic and has no classical counterpart" is itself an additional assumption—one generated by historical path dependence, lacking independent justification. What NQT does is precisely to remove this superfluous assumption, not to introduce a new one.

Fourth, it upholds more fundamental scientific, logical, and philosophical principles, using them as criteria to scrutinize elements within existing theory that violate these principles. Specifically:

At the level of scientific principles, physical quantities must possess physical content, and observable quantities must correspond to physical mechanisms. The claim that "intrinsic spin has no classical counterpart" violates this basic requirement—it acknowledges that spin can be measured, can produce torque, and can couple with magnetic fields, yet simultaneously asserts that it corresponds to no physical motion whatsoever. NQT points out that this self-contradiction is not profundity but negligence.

At the level of logical principles, the vector addition J=L+SJ=L+S requires that both terms share the same dimensions and the same physical character. Treating one term as a genuine angular momentum and the other as an "abstract quantum number" is logically equivalent to adding kilograms to a dimensionless label. NQT simply insists on the basic logic of addition.

At the level of philosophical principles, Occam's razor demands the elimination of unnecessary entities. The claim that "spin is an entirely new, intrinsic property with no classical counterpart" is precisely an additional ontological assumption. When Thomas precession and the Zeeman effect can already fully explain the observational facts through physical rotation, this extra assumption is precisely what should be excised. NQT stands on the side of Occam's razor, not against it.

Fifth, it clarifies the physical meaning of solving the Schrödinger equation. Solving the Schrödinger equation is, in its mathematical essence, performing a spectral analysis of the physical system—decomposing the system's evolution into its natural frequency components determined by the Hamiltonian. This is not a metaphysical act of "collapsing possibilities into reality"; it is the same kind of spectral decomposition that appears throughout classical physics, from Fourier analysis of vibrating strings to normal mode analysis of coupled oscillators. NQT recognizes this for what it is: the identification of a system's characteristic frequencies and modes, a procedure with clear and direct physical meaning that requires no mysterious interpretation.

Sixth, it correctly locates the scope of validity of Hilbert space operations. The computational machinery of Hilbert space—state vectors, operator algebra, projection postulates—is not a fundamental description of physical reality but rather an effective calculational framework that becomes valid only after all physical assumptions and approximations have already been accepted. The choice of Hamiltonian, the truncation of degrees of freedom, the selection of boundary conditions—these physically substantive decisions precede and determine the Hilbert space structure, not the other way around. Elevating Hilbert space formalism from a computational tool to an ontological foundation reverses the actual logical order. NQT restores this order: physics first, then the mathematics that serves it.

Summary of Distinguishing Criteria

Criterion

Pseudoscientific Theories

Natural Quantum Theory

Mathematical formalism

Modified or abandoned

Preserved in its entirety

Foundational assumptions

New assumptions introduced

Superfluous assumptions removed

Experimental facts

Selectively ignored or denied

Neglected known facts restored

Relation to existing theory

Oppositional replacement

Internal clarification

Fundamental principles

Often violated unknowingly

Used as criteria to scrutinize existing theory

Physical meaning of equations

Ignored or mystified

Restored: Schrödinger equation as spectral analysis

Status of formalism

Conflated with ontology

Correctly identified as post-assumption computation

Nature of operation

Changing the rules

Re-reading the rules

A Precise Analogy

The work of NQT is closer to textual criticism than to starting from scratch. In the course of transmission, a classical text may have had certain passages misread, certain marginal notes taken as main text, and certain passages of the original overlooked. The textual critic does not alter the original; they merely identify where received understanding has deviated from the internal logic of the text itself. What NQT does to the mathematical formalism of quantum mechanics is precisely this kind of work—the original mathematical text never stated that spin is not a physical rotation; it was the subsequent interpretive tradition that imposed this meaning.

All of this effectively reverses the usual offensive-defensive dynamic. Ordinarily, it is mainstream theory that scrutinizes challengers in the name of "fundamental principles." But in the case of NQT, the situation is precisely the opposite—it is NQT that scrutinizes the inconsistencies within mainstream interpretation using more fundamental principles. This is not a challenge to science; it is a defense of science's own logical standards, opposing the inertia of substituting authoritative consensus for logical argument.

This is the unbridgeable boundary between NQT and pseudoscientific theories: it does not ask anyone to accept anything new; it only asks that what already exists be taken seriously.