Correct English convention for |Psi|^2?

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Discussion Overview

The discussion revolves around the correct English terminology for expressing the mathematical concept of |Ψ|², specifically in the context of wavefunctions in physics. Participants explore various phrases used to describe this concept and their acceptability in both mathematical and linguistic terms.

Discussion Character

  • Debate/contested

Main Points Raised

  • Some participants list several phrases used to describe |Ψ|², including "modulus square of the wavefunction," "modulus squared of the wavefunction," "square modulus of the wavefunction," and "squared modulus of the wavefunction," questioning which is correct or if they all are acceptable.
  • One participant expresses a preference for "squared modulus of the wavefunction" and "modulus squared of the wavefunction," suggesting that while the other terms are understandable, they may indicate a lack of familiarity with standard terminology.
  • Another participant agrees that "squared modulus" sounds correct in English, while "modulus squared" seems more mathematically accurate, also mentioning "square of the modulus" as a valid expression.
  • A different viewpoint suggests that using the notation ##|\psi|^2## is clearer and more concise than any verbal description.
  • One participant argues that "squared norm" or "norm squared" is the more accurate terminology, as |Ψ| represents the norm of a state vector, while also acknowledging that |Ψ(x)|² can be referred to as the modulus squared of the complex number Ψ(x) if the wavefunction is continuous.

Areas of Agreement / Disagreement

Participants express differing opinions on the preferred terminology, with no consensus reached on which phrase is definitively correct. Multiple competing views remain regarding the appropriateness of various terms.

Contextual Notes

Some terms may depend on the context in which they are used, such as whether the discussion is focused on linguistic correctness or mathematical precision. The discussion also highlights potential assumptions about familiarity with mathematical terminology among speakers.

Aidyan
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I Google and find all of the following are used:

Modulus square of the wavefunction
Modulus squared of the wavefunction
Square modulus of the wavefunction
Squared modulus of the wavefunction

Which is correct? Or are these all correct? Or does it depend from... what? I'm confused, need help.
 
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As a native (American) English speaker, I would consider both of the following to be "acceptable" or "natural" in terms of English usage. I slightly prefer the first one:

Squared modulus of the wavefunction
Modulus squared of the wavefunction

If I saw one of the other two, I would understand what the writer means, but I would suspect that he/she is not a native English speaker, or perhaps has not studied mathematics enough to be familiar with standard terminology.
 
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Aidyan said:
Squared modulus of the wavefunction
That sounds "correct" for proper English, Modulus squared sounds more correct mathematically. (Ψ2) Square of the modulus would be good English, also.
 
Well, formulae say more than 1000 words. Just write ##|\psi|^2##, and it's clear what's meant ;-)).
 
Really correct is ''squared norm'' or ''norm squared'', since ##|\psi|## is the norm of a state vector and not a modulus. On the other hand, ##|\psi(x)|^2## deserves to be called a modulus squared of the complex number ##\psi(x)## (if the wave function is continuous).
 
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