[ExI] An at-home Quantum Entanglement Experiment

[Jason Resch]

On Thu, Aug 13, 2026, 7:16 AM John Clark <johnkclark at gmail.com> wrote:

>
>
> On Mon, Aug 10, 2026 at 8:11 PM Jason Resch via extropy-chat <
> extropy-chat at lists.extropy.org> wrote:
>
>
> *You might want to include this, it's a very simple and extremely cheap
> way to demonstrate that electrons are spinning, or at least prove that they
> have angular momentum. *
>
>
> * Do Electrons Really Have "Intrinsic" Angular Momentum?
> <https://www.youtube.com/watch?v=uQ5w4_0S2l4>*
>
> *John K Clark*
>



Thanks that is quite cool.

You might also appreciate this as I know you have tried to explain things
like this in the past. I asked GPT to write an as clear and basic and easy
to follow account of the Mermin device and it produced what I think is the
best eland clearest explanation of the result:

https://archive.is/7PTlt

Feel free to share it.

Jason



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> With substantial help from AI, I've put together an open source project (
>> https://github.com/jasonkresch/quantum-entanglement/ ) that allows
>> anyone to perform an at-home demonstration of quantum entanglement. For
>> about $500 in parts, one can demonstrate not only quantum entanglement, but
>> also a number of Nobel-prize worthy results, including:
>>
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>>    - Rutherford's 1908 Nobel Prize for discovering the *radioactive
>>    transformation* of elements (this experiment involves the transition
>>    of Sodium to Neon).
>>    - Arthur Compton's 1927 Nobel Prize (as this experiment involves *Compton
>>    scattering* gamma rays off of aluminum blocks).
>>    - Einstein's 1921 prize for discovering the *photoelectric effect*
>>    and proving photons exist (since the Geiger-Müller tube only detects
>>    high-energy photons capable of dislodging an electron from the tube wall).
>>    - Dirac's prediction of, and Carl Anderson's experimental discovery
>>    of *antimatter and positrons*, both earning Nobel prizes, in 1932 and
>>    in 1933. (as this experiment uses positrons, and antimatter annihilation to
>>    produce an entangled photon pair, it also demonstrates *E=mc^2*, as
>>    the gamma ray energies are each at the rest-mass of the electron and
>>    positron (511 keV)).
>>    - Victor Hess's 1936 Nobel prize for his discovery of *cosmic rays*
>>    (the detectors can be stacked vertically to detect muons generated in the
>>    upper atmosphere by cosmic ray collisions.
>>    - The *Coincidence Method* pioneered by Walther Bothe in 1925,
>>    earning him the Nobel prize in 1954 (this experiment uses simultaneous
>>    detections to determine when Geiger detections result from the same de-cay
>>    event, which is also the basis of PET scans in hospitals).
>>    - *Quantum Entanglement* as was the basis for the 2022 Nobel Prize
>>    awarded to Aspect, Clauser, and Zeilinger, as this experiment uses Compton
>>    Polarimetry to show the photon pair is not just simultaneous, but that they
>>    demonstrate correlations in their scattering behavior.
>>
>> I think it could serve as the basis for any number of great science
>> experiments. The main costs are the Geiger counter kits (two at $115 each),
>> the Na-22 source ($60), and the Arduino ($20), so if one already has all
>> the stuff for soldering/wiring it can be done for much less than $500.
>>
>> It's hard to imagine a cheaper, simpler way of demonstrating so much of
>> 20th century science.
>>
>> Jason
>> __
>>
>
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