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Very limited references makes verifying the content of this page very difficult.
In the section Wave_packet#Gaussian_wave_packets_in_quantum_mechanics the content around "wave-packet spreading" cites Darwin, Charles Galton. "Free motion in the wave mechanics." Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character 117.776 (1927): 258-293.
That article is available https://royalsocietypublishing.org/doi/pdf/10.1098/rspa.1927.0179?download=true
However the article does discussed the spread of a moving Gaussian wave packet, not a stationary one. See equation 4.5. The content in the page is therefore a derived result, not encyclopedic. I believe the content is physically correct, but we have no independent way to know. Johnjbarton ( talk) 18:17, 28 May 2023 (UTC)
The current article says:
Quantum mechanics ascribes a special significance to the wave packet; In the Copenhagen interpretation, it is interpreted as a probability amplitude, its norm squared describing the probability density that a particle or particles in a particular state will be measured to have a given position or momentum.
This statement is unreferenced and incorrect. The sentence is mostly correct for a "wave function" not at all correct for a "wave packet". A wave packet is a multiple wave construct. It's interpretation is entire orthogonal to that construction. Johnjbarton ( talk) 01:37, 21 June 2023 (UTC)
This article incorrectly equates "wave packet" with wave particle duality. The history section is especially egregious. It does not have a single reference about the history of wave packets. Johnjbarton ( talk) 02:42, 21 June 2023 (UTC)
100 117.18.228.234 ( talk) 16:04, 16 December 2023 (UTC)
I really like the Shrödinger part where it is used as a way to show what a dispersive medium can do, but I would like to add that I don't know many particles obbeying the Shrodinger's equation. If you describe photons, you will use Maxwell's equation and quantize them as much as you can, if you look at electrons, you will deal with the Dirac equation. None of them exhibit that dispersive behavior (at least in vacuum). That dispersive behavior is a pathology of the model, it creates faster than light signals. Klinfran ( talk) 10:38, 15 June 2024 (UTC)