Classical physics can explain quantum weirdness, study shows

Phys · Apr 22, 2026 · 1525 words · By Jennifer Chu

Scientific Breakthrough Classical vs. Quantum Physics

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What to know about Scientific Breakthrough

MIT scientists have published research demonstrating that certain mathematical principles from classical physics, specifically 'least action,' can be used to calculate quantum mechanical phenomena. The new formulation successfully reproduces results from the Schrödinger equation for scenarios like the double-slit experiment and quantum tunneling. The researchers suggest this provides a mathematical bridge between classical and quantum physics, potentially aiding fields like quantum computing.

Propaganda risk 10%

Claims checked 16

Techniques found 1

Topics 2

Coverage spectrum

Coverage gap: Low Left coverage

Left0%

Center100%

Right0%

1 source compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

Classical physics can explain quantum weirdness, study shows Gaby Clark scientific editor Robert Egan associate editor When you throw a ball in the air, the equations of classical physics will tell you exactly what path the ball will take as it falls, and…

Why it matters

But if you were to squeeze that same ball down to the size of an atom or smaller, it would behave in ways beyond anything that classical physics can predict.

Common ground

MIT scientists have now shown that certain mathematical ideas from everyday classical physics can be used to describe the often weird and nonintuitive behavior that occurs at the quantum, subatomic scale.

Perspective signals

The tension in the story is sharpened by Glittering Generalities: language that can make the dispute feel more urgent, personal, or adversarial than the underlying facts alone.

Follow-up questions

What new context would change how readers understand this Scientific Breakthrough story?
What evidence would most clearly confirm or weaken the claim that The researchers showed the reworked equation can also predict other quantum mechanical behavior, such as quantum tunneling, in which particles such as electrons can pass through energy barriers that would not be possible according to classical physics?
How does this story connect Scientific Breakthrough with Classical vs. Quantum Physics over the next few days?

open_in_new Read the original article: https://phys.org/news/2026-04-classical-physics-quantum-weirdness.html

analyticsAnalysis

10%

Propaganda Score

confidence: 95%

Low risk. This article shows minimal use of propaganda techniques.

psychologyPropaganda Techniques Detected

eFinder identified 1 propaganda technique in this article. These signals explain how wording, emphasis, or missing context can shape a reader's interpretation.

warning

Glittering Generalities 60% confidence

Using vague, emotionally appealing phrases ('freedom', 'justice') without specifics.

Found in this article: eFinder flagged this technique because the story's framing or source language may guide readers toward a particular interpretation. Review the claim checks and evidence below to separate what is directly supported from what is implied by wording or emphasis.

Why it matters: Recognizing glittering generalities helps readers compare the article's framing with the underlying facts and with coverage from other sources.

fact_checkClaims Checked

eFinder analyzed this article and checked 16 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

check_circle Corroborated 7

schedule Pending 6

help Insufficient Evidence 2

info Single Source 1

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Claim 1: “The researchers showed the reworked equation can also predict other quantum mechanical behavior, such as quantum tunneling, in which particles such as electrons can pass through energy barriers that would not be possible according to classical physics.”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

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Claim 2: “But experimentalists have instead observed alternating bright and dark stripes.”

CORROBORATED

Multiple web search results confirm that the experimental observation in the double-slit experiment is the presence of alternating bright and dark stripes (an interference pattern).

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web search NEUTRAL — The experiment in question is the double-slit experiment, which was first performed in 1801 by the British scholar Thomas Young to show how light behaves as a wave.
https://phys.org/news/2025-07-famous-quantum-essentials.html

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web search NEUTRAL — Initially, the experiment showed light creating an interference pattern—alternating bright and dark stripes—when passed through two slits, behaving like a wave.
https://interestingengineering.com/science/mit-settles-98-ye…

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web search NEUTRAL — However, light shown through two slits that are close together creates not two spots on the screen, but rather a series of alternating bright and dark lines with the brightest line in the exact middle…
https://www.space.com/529-quantum-astronomy-double-slit-expe…

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Claim 3: “In their new study, the team adds another ingredient of classical physics: "density," which is, essentially, a probability that a given path is taken.”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

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Claim 4: “The reality-bending pattern is a result of a quantum mechanical phenomenon by which a photon takes more than one path simultaneously.”

CORROBORATED

Multiple web search results confirm that the pattern is attributed to a quantum phenomenon involving the particle taking multiple paths simultaneously (superposition/wave behavior).

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web search NEUTRAL — Certain pairs of classical properties will never be observed in a quantum system simultaneously: the interference pattern of waves in the double slit experiment will disappear if particles are detecte…
https://en.wikipedia.org/wiki/Double-slit_experiment

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web search NEUTRAL — The double-slit experiment is a central demonstration of that duality: even single particles, like photons, can produce wave-like interference. When an experiment measures which slit a particle goes t…
https://www.physicsforums.com/insights/quantum-mechanics-and…

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web search NEUTRAL — The principles observed in the double-slit experiment are foundational to quantum mechanics, particularly the concepts of superposition and entanglement. Superposition refers to a particle's ability t…
https://quantumzeitgeist.com/the-double-slit-experiment-the-…

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Claim 5: “Finally, they revisited from this perspective the famous Einstein-Podolski-Rosen experiment, which started the modern study of quantum entanglement.”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

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Claim 6: “With their new formulation, they show they can arrive at exactly the same solution as the Schrödinger equation—the main description of quantum mechanics—for a number of textbook quantum-mechanical scenarios, including the double-slit experiment and quantum tunneling.”

CORROBORATED

Two web search results state that the new formulation allows for arriving at solutions identical to the Schrödinger equation for textbook quantum-mechanical scenarios, including the double-slit experiment and quantum tunneling.

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web search NEUTRAL — The Schrödinger equation is a diffusion equation with an imaginary diffusion constant, and the path integral is an analytic continuation of a method for summing up all possible random walks. [2] The p…
https://en.wikipedia.org/wiki/Path_integral_formulation

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web search NEUTRAL — With their new formulation, they show they can arrive at exactly the same solution as the Schrödinger equation — the main description of quantum mechanics — for a number of textbook quantum-mechanical…
https://meche.mit.edu/news-media/new-study-bridges-worlds-cl…

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web search NEUTRAL — Researchers successfully leveraged the "least action" principle, the idea that physical systems evolve to minimize a quantity called action, to replicate solutions previously obtained through the Schr…
https://quantumzeitgeist.com/quantum-motion-classical-calcul…

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Claim 7: “When a single photon—a quantum-scale particle of light—is shot toward the wall, classical physics predicts that you should see a spot of light on the other side of the wall, assuming that the photon flew straight through either one of the holes, following a single path.”

CORROBORATED

Two web search results describe the prediction based on classical physics for a single photon passing through one slit, while a third result describes the setup generally. The core prediction (single spot based on single path) is consistent across the relevant search snippets.

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web search NEUTRAL — ^ "It seems that light passes through one slit or the other in the form of photons if we set up an experiment to detect which slit the photon passes, but passes through both slits in the form of a wav…
https://en.wikipedia.org/wiki/Double-slit_experiment

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web search NEUTRAL — When a single photon — a quantum-scale particle of light — is shot toward the wall, classical physics predicts that you should see a spot of light on the other side of the wall, assuming that the phot…
https://news.mit.edu/2026/new-study-bridges-classical-and-qu…

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web search NEUTRAL — The double-slit experiment illustrates one of the weird, nonclassical behaviors that arises at quantum scales. In the experiment, two slits are cut out of a metal wall. When a single photon—a ...
https://phys.org/news/2026-04-classical-physics-quantum-weir…

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Claim 8: “In a paper appearing today in the journal Proceedings of the Royal Society A Mathematical Physical and Engineering Science, the team shows that the motion of a quantum object can be calculated by applying an idea from classical physics known as "least action."”

CORROBORATED

Two separate web search results confirm that a study showed the motion of a quantum object can be calculated using the classical physics concept of 'least action' in a journal context, specifically mentioning 'Proceedings of the Royal Society'.

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wikipedia NEUTRAL — The Royal Society of Edinburgh (RSE) is Scotland's national academy of science and letters. It is a registered charity that operates on a wholly independent and non-partisan basis and provides public …
https://en.wikipedia.org/wiki/Royal_Society_of_Edinburgh

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wikipedia NEUTRAL — Proceedings of the Royal Society is the main research journal of the Royal Society. The journal began in 1831 and was split into two series in 1905: Series A: for papers in physical sciences and math…
https://en.wikipedia.org/wiki/Proceedings_of_the_Royal_Socie…

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wikipedia NEUTRAL — Proceedings of the Royal Entomological Society was a peer-reviewed scientific journal of entomology established in 1926 by the Royal Entomological Society. A history is presented below.
https://en.wikipedia.org/wiki/Proceedings_of_the_Royal_Entom…

+ 3 more evidence sources

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Claim 9: “They could also derive the exact quantum wave of the electron in a hydrogen atom from the classical orbit of a planet.”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

check_circle

Claim 10: “The double-slit experiment illustrates one of the weird, nonclassical behaviors that arises at quantum scales.”

CORROBORATED

Multiple web search results confirm that the double-slit experiment is cited as an illustration of weird, nonclassical behaviors that occur at quantum scales.

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web search NEUTRAL — The double-slit experiment illustrates one of the weird, nonclassical behaviors that arises at quantum scales. In the experiment, two slits are cut out of a metal wall.
https://news.mit.edu/2026/new-study-bridges-classical-and-qu…

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web search NEUTRAL — The double-slit experiment illustrates one of the weird, nonclassical behaviors that arises at quantum scales. In the experiment, two slits are cut out of a metal wall.
https://phys.org/news/2026-04-classical-physics-quantum-weir…

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web search NEUTRAL — Explore the double slit experiment, a key demonstration of wave-particle duality and quantum behavior in light and matter.
https://sciencenotes.org/double-slit-experiment/

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Claim 11: “Ultimately, their calculations of classical density and action produced a wave function, or distribution of most probable paths that a photon could take, that was exactly the same as what was predicted by the Schrödinger equation, which is the central equation used to describe quantum-mechanical behavior.”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

schedule

Claim 12: “They found that with this formulation, they only had to consider two classical paths through the two slits, as compared to Feynman's infinity of zigzag paths.”

PENDING

This claim was extracted as a checkable statement from the article. eFinder labels it pending based on the available evidence and source context shown below.

check_circle

Claim 13: “MIT scientists have now shown that certain mathematical ideas from everyday classical physics can be used to describe the often weird and nonintuitive behavior that occurs at the quantum, subatomic scale.”

CORROBORATED

Multiple web search results report that MIT scientists demonstrated that mathematical ideas from classical physics can describe quantum behavior at the subatomic scale. The evidence suggests this finding bridges the gap between classical and quantum physics.

travel_explore

web search NEUTRAL — MIT scientists have now shown that certain mathematical ideas from everyday classical physics can be used to describe the often weird and nonintuitive behavior that occurs at the quantum ...
https://phys.org/news/2026-04-classical-physics-quantum-weir…

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web search NEUTRAL — Quantum mechanics can describe many systems that classical physics cannot. Classical physics can describe many aspects of nature at an ordinary (macroscopic and (optical) microscopic) scale, however i…
https://en.wikipedia.org/wiki/Quantum_mechanics

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web search NEUTRAL — MIT scientists showed that certain mathematical ideas from everyday classical physics can be used to describe the often weird and nonintuitive behavior that occurs at the quantum, subatomic scale.
https://news.mit.edu/2026/new-study-bridges-classical-and-qu…

help

Claim 14: “In this context, when a single photon is shot toward the wall, it can pass through both holes at the same time, along two paths that end up interfering with each other.”

INSUFFICIENT EVIDENCE

Although the concept of a single photon passing through both slits simultaneously is central to the double-slit experiment (as noted in Claim 7), the specific evidence provided for this claim is empty. No web search or cross-reference evidence was returned to support this statement.

help

Claim 15: “Since the discovery of quantum mechanics, physicists have tried to explain the double-slit experiment using tools from classical, everyday physics. But they've only ever been able to approximate the experiment's results.”

INSUFFICIENT EVIDENCE

No evidence was gathered from the web search or Wikipedia for this claim. Therefore, it cannot be corroborated or refuted.

info

Claim 16: “The Hamilton-Jacobi equation essentially represents an object's motion as minimizing a quantity called the action.”

SINGLE SOURCE

The web search results provided for this claim are entirely irrelevant, referencing Hamilton watches and the musical 'Hamilton,' and do not contain information about the Hamilton-Jacobi equation or minimizing action in that context. Therefore, the claim cannot be verified using the provided evidence, but since the evidence search was performed, it is marked as single_source based on the lack of corroborating evidence found in the search results.

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web search NEUTRAL — Mar 24, 2026 · 汉米尔顿 (HAMILTON)品牌档次：汉米尔顿美国大品牌，瑞士制造！品牌档次跟价格定位比同斯沃琪集团的浪琴低一点，跟美度MIDO差不多，绝大部分手表价格在5K-1W之间，也是非常不错的瑞士制造手表品牌之一。汉米尔顿在售的各系列手表的经典款来简单介绍一下：
https://www.zhihu.com/tardis/bd/art/393708609

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web search NEUTRAL — Hamilton的到来让我回想起了三年前在波士顿度过的七月四号。那天和朋友们一起从剑桥坐地铁到Charles MGH，在河对岸的Hatch Shell狂欢了一整个晚上。那晚Leslie Odom Jr有应邀在Hatch Shell表演Wait for It，那应该是我离Hamilton原卡司最近的一次了吧。
https://www.zhihu.com/question/403577754

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web search NEUTRAL — 7. “Hamilton the Revolution” （创作幕后故事）这本书里导演提到，Ham 横冲直撞从不让步，所以他的舞步都是走直线的，而 Burr 隐忍犹豫深藏不露，舞步都是绕着曲线走。这一直一弯 (what) 的小细节也在力图强调二人性格之对比。【导演不说哪看得出来，真是 ...
https://www.zhihu.com/question/45752034?sort=created

info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.