What is Cn in quantum mechanics?

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Discussion Overview

The discussion centers around the meaning and context of the symbol Cn in quantum mechanics, particularly in relation to the "sudden approximation." Participants explore its usage and significance in mathematical expressions related to quantum states.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant asks for clarification on the meaning of Cn in quantum mechanics.
  • Another participant notes that Cn is context-dependent and lacks a standard definition.
  • A participant mentions seeing Cn in the derivation of the "sudden approximation" but does not provide specific details.
  • It is pointed out that Cn represents the complex coefficient in a series expansion, specifically in the equation ι∅(t) = ∑CneiEnt/h, where n ranges from 1 to infinity.
  • Links to previous discussions and resources are suggested to aid in understanding the context of Cn.

Areas of Agreement / Disagreement

Participants generally agree that Cn is a context-dependent symbol, but there is no consensus on its specific meaning or application in the "sudden approximation." The discussion remains unresolved regarding its precise interpretation.

Contextual Notes

The discussion highlights the ambiguity of Cn's definition and its reliance on specific contexts within quantum mechanics. There are references to external resources that may provide further insight, but these have not been universally accepted as definitive.

Tooba Sohail
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What is Cn in quantum mechanics?
 
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What is the context in which you saw this?
 
I saw in derivation of "sudden approximation"
 
Be more specific. Cn is just a symbol that is highly context dependent. There is no standard meaning of Cn.
 
ι∅(t) = ∑CneiEnt/h
 
Tooba Sohail said:
ι∅(t) = ∑CneiEnt/h

The equation contains a sum of terms indexed by the integer n, and n ranges from 1 to infinity.

Cn is the complex coefficient in term n.

You can see similar notation in http://lpsa.swarthmore.edu/Fourier/Series/ExFS.html
 
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atyy said:
The equation contains a sum of terms indexed by the integer n, and n ranges from 1 to infinity.

Cn is the complex coefficient in term n.

You can see similar notation in http://lpsa.swarthmore.edu/Fourier/Series/ExFS.html
Thanks for telling
 

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