How to start learning quantum physics

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Discussion Overview

The discussion revolves around how to start learning quantum physics, particularly focusing on the prerequisites in mathematics and foundational physics knowledge. Participants explore the necessary background in calculus and classical mechanics, as well as resources for learning.

Discussion Character

  • Exploratory, Homework-related, Technical explanation

Main Points Raised

  • One participant expresses a desire to learn quantum physics but lacks a strong mathematical background, specifically in calculus.
  • Another participant suggests that without a solid understanding of classical mechanics, learning quantum physics may be difficult, questioning the ability to write down the Hamiltonian for hydrogen.
  • A different participant emphasizes the importance of understanding the underlying mathematics, recommending that the learner acquire knowledge in calculus, linear algebra, and possibly differential equations before tackling quantum mechanics.
  • One participant proposes using introductory modern physics textbooks, which typically require prior knowledge of classical mechanics and calculus, and mentions the availability of online lecture notes as a supplementary resource.

Areas of Agreement / Disagreement

Participants generally agree that a strong mathematical foundation is crucial for learning quantum physics, but there is no consensus on the exact prerequisites or the best resources to start with.

Contextual Notes

Limitations include the learner's current understanding of calculus and classical mechanics, which may affect their ability to grasp quantum physics concepts and equations. The discussion does not resolve the best approach to acquiring the necessary mathematical skills.

Who May Find This Useful

Individuals interested in starting their journey in quantum physics, particularly those with limited mathematical backgrounds or those seeking resources for self-study.

coolbeans777
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Hi everybody, I've been wanting to learn quantum physics for quite some time, except I really don't know where to start. I already understand some of the concepts such as wave particle duality, and how all particles move through space as a Y wavefunction, which collapses into a definite particle when it is measured or interacts with something. I don't know calculus, but I do understand what derivatives are and how to find them. I want to learn not just concepts but the equations that explain. Are there any free books online that I can download?
 
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coolbeans777 said:
I don't know calculus

This could be a problem. Have you studied classical mechanics in any depth? If someone told you to write down the hamiltonian for hydrogen would you know what it looked like? If not, you should probably study classical mechanics first, otherwise everything is just going to be gibberish...
 
coolbeans777 said:
I want to learn not just concepts but the equations that explain. Are there any free books online that I can download?

The equations aren't going to make any sense if you don't understand the math behind them. If you want to learn quantum mechanics, you'd probably be best off learning some more math first. Calculus and linear algebra are some things you'll definitely want to have in your toolkit, and maybe differential equations as well, although it's not paramount. Once you have a strong mathematical foundation, applying that to quantum will be much easier (although still not necessarily easy).
 
Since you know some calculus, you might consider a standard "introductory modern physics" textbook which is aimed at students who have completed a first-year course in classical mechanics and electromagnetism, and an introductory calculus course. For example,

https://www.amazon.com/dp/013805715X/?tag=pfamazon01-20

There are others by e.g. Beiser, Tipler and Ohanian. These aren't free, of course, but you can find used copies which are cheaper than new ones.

I recently found these online lecture notes which might be useful, although they're not as detailed as a real textbook.

http://galileo.phys.virginia.edu/classes/252/
 

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