I would like to learn about the string theory.

Fuinne
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Why hello there my fellow science lovers,

I'm some what new to the forums, and I'm loving it here. If this is being posted in the wrong section, I am very sorry. Anyways, I'm aware of the whole idea of the string theory. General relativity governs motion at a macroscale and quantum field theory governs movement at a micro scale, and in order to combine them together into one unifying theory, an equation that describes motion at both a macro scale and micro scale, the string theory was suggested. I was trying to read more and encountered lots of articles about super strings and extra dimensions. I usually read a lot online about stuff like this, in fact, yesterday I spent just about 3 hours in between two of my exams reading about it.

My question is involving the little pieces of the string theory. I want to know what super strings are, and how there can be extra (9 to 10) dimensions hidden at a quantum scale. If someone would generously help me out, that would honestly mean the world to me. I don't have a degree in physics or anything like that but I for sure plan on getting one one day. For now, it's just reading and watching videos about it.

Thank you very much!

Finn
 
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String theories so far are mathematical models which propose that underlying the 'standard model' of particle physics there could be still smaller more fundamental entities.
The math requires additional dimensions which cannot be observed in practice at the present time, so it's not a testable theory , even if it does make mathematical sense.
Opinions therefore differ a lot, personally I hope that someday it will become testable, but I don't think that will be soon.
 
rootone said:
String theories so far are mathematical models which propose that underlying the 'standard model' of particle physics there could be still smaller more fundamental entities.
The math requires additional dimensions which cannot be observed in practice at the present time, so it's not a testable theory , even if it does make mathematical sense.
Opinions therefore differ a lot, personally I hope that someday it will become testable, but I don't think that will be soon.
Isn't it something like if you see a clothles line from a distance and see an ant on it, you're only seeing one line, but in that ant's perspective he's able to move around?
 
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bhobba said:
Its OK to post here - string theory is a quantum theory.

It is however mathematically advanced. The easiest actual textbook I know is the following:
https://www.amazon.com/dp/0521880327/?tag=pfamazon01-20

Be warned - I have a copy and its not easy going.

Thanks
Bill
Thank you
 
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Not an expert in QM. AFAIK, Schrödinger's equation is quite different from the classical wave equation. The former is an equation for the dynamics of the state of a (quantum?) system, the latter is an equation for the dynamics of a (classical) degree of freedom. As a matter of fact, Schrödinger's equation is first order in time derivatives, while the classical wave equation is second order. But, AFAIK, Schrödinger's equation is a wave equation; only its interpretation makes it non-classical...
Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. Towards the end of the first lecture for the Qiskit Global Summer School 2025, Foundations of Quantum Mechanics, Olivia Lanes (Global Lead, Content and Education IBM) stated... Source: https://www.physicsforums.com/insights/quantum-entanglement-is-a-kinematic-fact-not-a-dynamical-effect/ by @RUTA
Is it possible, and fruitful, to use certain conceptual and technical tools from effective field theory (coarse-graining/integrating-out, power-counting, matching, RG) to think about the relationship between the fundamental (quantum) and the emergent (classical), both to account for the quasi-autonomy of the classical level and to quantify residual quantum corrections? By “emergent,” I mean the following: after integrating out fast/irrelevant quantum degrees of freedom (high-energy modes...

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