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Main positions:Director, High Performance Computing Platform, PKU
Degree:Doctoral degree
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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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Quantum Mechanics: A Misinterpreted Classical Theory
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Introduction: A Century of Misunderstanding

Imagine someone interpreting a piano score as the literal trajectory of vibrating strings, or reading a spectrogram of a symphony as a probability distribution of musical notes in space—you would rightly consider this absurd. Yet this is precisely the error physics has committed with quantum mechanics: we have mistaken the spectral analysis of a vibrational system for the dynamical law of particles.

For over a century, quantum mechanics has been regarded as the most mysterious and counterintuitive theory in physics. It allegedly tells us that a particle can be in two places at once, that observation collapses the wavefunction, and that “spooky” action at a distance exists—claims that have perplexed students and troubled even Einstein.

But what if I told you that all this “mystery” stems from a fundamental misreading? What if quantum mechanics actually describes a fully classical electromagnetic vibrational system, and we have simply misinterpreted its mathematical output?

Chapter 1: Spectral Analysis—The Forgotten Truth

What Is Spectral Analysis?
Consider a simple example: when you use a smartphone app to analyze music, it displays the intensity of different frequencies—this is spectral analysis. It does not tell you how individual air molecules move; it reveals which frequency components constitute the sound wave.

The same principle applies to any vibrational system:

  • Guitar string: spectral analysis yields fundamental frequency and overtones

  • Building: spectral analysis identifies resonant frequencies

  • Electrocardiogram: spectral analysis detects abnormal rhythms

  • Atom: spectral analysis gives… energy levels!

The True Identity of the Schrödinger Equation
When we write the famous Schrödinger equation:

�^�=��,H^ψ=Eψ,

we are not asking, “Where is the electron?” but rather, “What are the system’s vibrational frequencies?” Mathematically, this equation is identical to:

  • Solving for drumhead vibration modes

  • Analyzing acoustic modes of an organ pipe

  • Finding eigenfrequencies of a microwave cavity

In other words, the Schrödinger equation is a spectral analysis tool—not an equation of particle motion.

Global Analysis vs. Local Description
A crucial distinction must be drawn:

  • Local description: tells you what happens at a specific time and place

  • Global analysis: reveals the overall frequency characteristics of the entire system

Quantum mechanics belongs to the latter. Like a musical spectrogram, it tells you which notes are present in a composition, but not the exact position of air molecules at any given instant.

Chapter 2: Hilbert Space—Less Mysterious Than It Seems

Demystifying the Mathematics
“Hilbert space” sounds esoteric, but it is simply:

  • In signal processing: the space of all possible signals

  • In music analysis: the space of all possible timbres

  • In quantum mechanics: the space of all possible vibrational modes

This is not a mystical “quantum realm,” but a standard mathematical framework widely used in:

  • Communication engineering: modulation signal analysis

  • Image processing: JPEG compression algorithms

  • Seismology: earthquake wave decomposition

  • Medical imaging: MRI signal reconstruction

The Ordinary Nature of Operators
Quantum operators appear mysterious but correspond to familiar signal-processing operations:

Quantum Operator Signal Processing Analog Everyday Analogy
Hamiltonian �^H^ Spectrum analyzer Music app’s frequency display
Momentum �^p^ Spatial frequency filter Edge detection in images
Position �^x^ Spatial-domain sampling Pixel values in a photograph
Angular momentum �^L^ Rotational symmetry analyzer Pattern recognition in circular forms

Chapter 3: Demystifying Quantum Phenomena

1. Superposition: Not Particle Duplication
Traditional view: The electron passes through both slits simultaneously.
Correct understanding: Like a piano chord—pressing C, E, and G produces a sound that is not “in three places at once,” but a superposition of three frequencies. Similarly, an atomic electron exists in a superposition of vibrational modes.

2. Wavefunction Collapse: Not Magic of Observation
Traditional view: Measurement mysteriously collapses the wavefunction.
Correct understanding: Like tuning a radio—the receiver (detector) only picks up a specific frequency. When it interacts with an atom, it “hears” one vibrational mode. This is not collapse, but selective response.

3. Uncertainty: A Consequence of Fourier Duality
Traditional view: Heisenberg’s principle reveals fundamental fuzziness in nature.
Correct understanding: This is a universal feature of all wave phenomena. A short drumbeat contains a broad frequency range; a sustained tuning fork has a narrow spectrum. Time and frequency precision cannot both be maximal—this is mathematical necessity, not physical mystery.

4. Quantum Entanglement: Correlation in a Global Mode
Traditional view: Particles influence each other faster than light via “spooky action.”
Correct understanding: Like a drumhead—striking one side causes the entire surface to vibrate. This is not information transfer, but different parts of a single global vibrational mode. Measuring one part samples the whole.

Chapter 4: The True Picture of the Atom

Beyond the Planetary Model
We must abandon the flawed image of electrons orbiting like planets. The real atom is:

  • An electromagnetic resonant cavity

  • The nucleus provides an electrostatic potential well

  • Electromagnetic fields form standing waves within it

  • Different standing wave patterns correspond to energy levels

  • “Electrons” are quanta of excitation of these standing waves

The Vibrational Nature of Chemical Bonds
Chemical bonds are not about “sharing electrons,” but:

  • Coupling of multiple atomic resonators

  • Formation of new collective vibrational modes

  • Bond strength reflecting coupling intensity

  • Chemical reactions as reorganization of vibrational modes

Natural Explanation of Spectral Lines
Atomic spectra are no longer mysterious:

  • Each line corresponds to the frequency difference between two vibrational modes

  • Emission is energy transfer from a higher- to a lower-frequency mode

  • Selection rules reflect symmetry properties of vibrational modes

  • Linewidth reflects coherence time of the vibration

Chapter 5: Reinterpreting the Mathematical Framework

Wavefunction: Amplitude of a Vibrational Field
�(�,�)ψ(r,t) should not be interpreted as a “probability amplitude for finding a particle,” but as:

  • The spatial distribution of a vibrational field

  • Analogous to acoustic or electromagnetic field quantities

  • ∣�∣2ψ2 as energy density, not probability density

  • Normalization as conservation of total energy

Quantum States: Labels for Vibrational Modes
Quantum numbers ∣�,�,�⟩n,l,m actually denote:

  • n: number of radial nodes

  • l: angular vibrational pattern

  • m: azimuthal symmetry

Exactly analogous to describing drumhead or spherical cavity modes.

Time Evolution: Natural Frequency Unfolding
The time-evolution operator �−��^�/ℏeiH^t/ℏ simply means:

  • Each frequency component evolves at its natural rate

  • Like simultaneous progression of musical notes

  • Phase relationships determine interference patterns

  • Energy eigenstates are stationary “pure tones”

Chapter 6: Origins of the Misinterpretation

Historical Contingency

  • Technological limits: In the 1920s, concepts from signal processing and spectral analysis were undeveloped

  • Philosophical bias: Positivism favored operational definitions over physical pictures

  • Mathematical success: Computational efficacy masked conceptual gaps

  • Authority effect: The Copenhagen interpretation became dogma

Cognitive Traps

  • Particle bias: Insistence on particle trajectories

  • Local thinking: Difficulty accepting global analytical methods

  • Mystification: Equating unfamiliarity with profundity

  • Paradigm lock-in: Predictive success discouraged critical reflection

Chapter 7: Re-positioning the Theory

The Proper Status of Quantum Mechanics
Quantum mechanics should be understood as:

  • A powerful computational tool: predicting spectra and reaction rates

  • A frequency-domain description: revealing global spectral features

  • A statistical method: suited for ensemble averages over identical experiments

  • Not a fundamental theory: but a spectral projection of deeper dynamics

What Is Missing?
We need:

  • Time-domain dynamics: real-time evolution of electromagnetic fields

  • Local theory: explanation of single-measurement events

  • Field-theoretic foundation: deriving quantum phenomena from field vibrations

  • Unified picture: connecting microscopic vibrations to macroscopic phenomena

Chapter 8: Practical Implications

Educational Reform
Quantum mechanics instruction should:

  • Begin with classical waves and vibrations

  • Emphasize spectral analysis methodology

  • Use signal-processing analogies

  • Avoid mystical narratives

Technological Opportunities
New understanding enables:

  • Classical simulation: modeling quantum systems with classical EM fields

  • Vibrational control: direct manipulation of atomic modes

  • Coherence-based devices: leveraging vibrational coherence

  • Quantum engineering: designing artificial atoms with tailored spectra

Experimental Directions
Future experiments should focus on:

  • Direct measurement of atomic electromagnetic field distributions

  • Real-time observation of vibrational mode evolution

  • Verification of field energy density profiles

  • Study of mode-coupling dynamics

Chapter 9: Philosophical Reflections

An Ontological Shift
This reinterpretation implies:

  • The world is continuous: fields vibrate, particles do not jump

  • The world is deterministic: chaotic but governed by classical EM evolution

  • The world is local: global correlations arise from field continuity

  • The world is intelligible: a natural extension of classical physics

Epistemological Lessons

  • Mathematics ≠ physics: formalism can obscure essence

  • Success ≠ understanding: accurate prediction does not guarantee correct interpretation

  • Authority must be questioned: even dominant paradigms

  • Intuition matters: EPR’s unease was justified

Conclusion: Emerging from the Fog

For a century, we have been misled by the formalism of quantum mechanics, mistaking the spectral output of a vibrational system for the mysterious behavior of particles. This is akin to interpreting a musical score as the trajectory of air molecules and then marveling at the “quantum nature” of music.

The truth is simpler—and more beautiful:

  • Atoms are electromagnetic resonant cavities

  • Quantum states are vibrational modes

  • Energy levels are resonant frequencies

  • Transitions are mode conversions

  • Quantum mechanics is the spectral analysis of this vibrational system

This is not a diminishment of quantum mechanics’ achievements. As a spectral tool, it is extraordinarily successful. But we must recognize its limits: it cannot describe real-time, local dynamical processes—just as a musical spectrogram cannot tell you the position of air molecules at a given instant.

The future of physics must transcend this century-old misreading and develop a genuine microscopic dynamical theory, properly situating quantum mechanics as its frequency-domain projection. Only then can we truly understand nature—not lose ourselves in mysteries of our own making.

Physics does not need mysticism. When viewed through the right lens, even the “weirdest” quantum phenomena are nothing more than the natural expressions of vibration and wave dynamics. It is time to emerge from the quantum fog and return to the essence of physics.