Why Strings Vibrate - Uncertainty Principle & Interactions Explained

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Discussion Overview

The discussion revolves around the reasons for the vibrations of strings in string theory, exploring the relationship between the uncertainty principle and string interactions. Participants also touch upon the mathematical formalism involved in quantizing strings and its connection to the simple harmonic oscillator (SHO).

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant questions the lack of explanation for why strings vibrate in string theory and suggests the uncertainty principle as a potential reason.
  • Another participant mentions that quantizing the string involves a formalism similar to that of the simple harmonic oscillator, leading to the interpretation of creation and annihilation operators as "creating vibrations."
  • A participant expresses confusion regarding the quantization of the simple harmonic oscillator and suggests that the discussion may relate to solving the wave equation for string harmonics.
  • Another participant clarifies that understanding the quantized string requires knowledge of the quantized simple harmonic oscillator.
  • One participant proposes that the discussion may involve solving Schrödinger's equation with a potential function akin to that of a spring.
  • A participant emphasizes the importance of both the formalism of quantization and the solution to understand the quantized string, providing links for further reading.

Areas of Agreement / Disagreement

Participants express varying levels of understanding regarding the quantization of strings and the simple harmonic oscillator, indicating that there is no consensus on the explanations provided or the connections made.

Contextual Notes

Some participants may have differing levels of familiarity with the concepts of quantization and the mathematical formalism involved, which could affect their interpretations and contributions to the discussion.

ShayanJ
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In the thing I've read about string theory,nothing is mentioned about why do they vibrate.
Can we tell one reason is uncertainty principle?
And then interaction between them,changes patterns?
Is there other reasons?
thanks
 
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When quantizing the string you apply (nearly) the same formalism as for the simple harmonic oscilllator, so you get creation and annihilation operators which you interpret as "creating vibrations"
 
I didn't understand completely.
I haven't heard about quantizing SHO!
Maybe you mean the harmonics of a string when you solve wave equation.
 
yes, I mean the wave equation; but you will not be able to understand the quantized string w/o understanding the quantized SHO
 
I guess you mean solving shcrodinger's equation with an potential function like the spring's.right?
 

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