Good books on QM with rigorous math

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Discussion Overview

The discussion revolves around recommendations for books on quantum mechanics (QM) that balance rigorous mathematics with physical intuition. Participants seek texts suitable for advanced undergraduates, emphasizing the need for both mathematical depth and conceptual understanding without delving into graduate-level complexity.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant expresses a desire for a QM book that combines rigorous mathematics with physical intuition, suitable for a first-time learner at an advanced undergraduate level.
  • Another participant suggests that "Shankar" is well-liked for its intuitive approach, but notes it may not differ significantly from "Griffiths" in terms of mathematical rigor.
  • A participant cautions against the term "rigorous mathematics," suggesting that the original poster may be looking for texts appropriate for third- and fourth-year physics majors.
  • Recommendations include "A Modern Introduction to Quantum Mechanics" by Townsend as potentially better preparation for graduate studies than Griffiths.
  • Another participant mentions "Quantum Theory for Mathematicians" by Hall, highlighting its requirement for a substantial background in pure mathematics and its omission of certain interesting aspects of quantum theory.
  • Discussion includes the idea that there are varying degrees of rigor in QM texts, with some books like "Shankar" and "Griffiths" using Hilbert space formalism but not addressing all technicalities rigorously.
  • One participant notes the difficulty of making QM rigorous without a strong mathematical background and suggests that achieving a high level of rigor may require extensive study of functional analysis and related topics.
  • Another participant recommends starting with "Griffiths" for foundational understanding before moving on to more rigorous texts like "Modern Quantum Mechanics" by J.J. Sakurai.

Areas of Agreement / Disagreement

Participants express a range of opinions on suitable texts, with no clear consensus on a single recommended book. Some agree on the merits of "Griffiths," while others suggest alternatives like "Shankar" and "Townsend," indicating a diversity of perspectives on what constitutes an appropriate level of rigor and intuition.

Contextual Notes

Participants highlight the challenge of finding texts that balance rigor and intuition, noting that many popular books may not fully address the mathematical complexities involved in QM. There is also mention of the need for a solid mathematical foundation to engage with more rigorous treatments of the subject.

Joker93
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I want to learn QM but in a way that i can learn both the deep mathematics, the physical intuition behind QM and the intuition behind the maths behind the QM(not many books have this).
Note that this is my first attempt to learn QM and i will be watching some video lectures online,so i won't be on my own!
I do not want something on graduate level,but i want something that is an introduction but on a more advanced undergrad level with rigorous math,emphasizes on intuition and-if possible- it also has some intuition on the mathematics that are or should be used.
Thank you
 
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For stuff like this, where there are many books and many opinions, I always think it is best to go with what most people like. And in my time at these forums, the one I've seen most liked is Shankar. Just putting it out there.
 
verty said:
For stuff like this, where there are many books and many opinions, I always think it is best to go with what most people like. And in my time at these forums, the one I've seen most liked is Shankar. Just putting it out there.
Shankar is a great book as far as intuition goes,but it doesn't differ from other popular books like Griffith's as far as mathematics go.
 
Be careful with the term "rigorous mathematics", as my guess is that you don't really mean this. My guess is that you want suggestions for texts that would be suitable for third- and fourth-year physics majors.
 
George Jones said:
Be careful with the term "rigorous mathematics", as my guess is that you don't really mean this. My guess is that you want suggestions for texts that would be suitable for third- and fourth-year physics majors.
Yeah,something like that.Sorry..
 
Actually, if both Griffiths and Shankar are unsuitable, now I am a bit confused. You could try

George Jones said:
I think that "A Modern Introduction to Quantum Mechanics" by Townsend,

https://www.amazon.com/dp/1891389785/?tag=pfamazon01-20

is good preparation for a graduate quantum mechanics class, probably better preparation than Griffiths.

Taking the term "rigorous mathematics" very seriously, there is "Quantum Theory for Mathematicians" by Hall. This looks to be a good book, but it requires substantial background in pure mathematics (e.g., real analysis), and it omits some of the most interesting bits of quantum theory, e.g., entanglement.
 
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George Jones said:
Actually, if both Griffiths and Shankar are unsuitable, now I am a bit confused. You could try
Taking the term "rigorous mathematics" very seriously, there is "Quantum Theory for Mathematicians" by Hall. This looks to be a good book, but it requires substantial background in pure mathematics (e.g., real analysis), and it omits some of the most interesting bits of quantum theory, e.g., entanglement.
I will check Townsend's book out for sure.Hall's book might not be what i am looking for though.I will check that out too.Thank you!
 
You kind of get to pick and choose how rigorous you want to be. Obviously there are a slew of "modern physics" books that teach simplified quantum theory using algebra and calculus. To learn it "properly," though, you probably want to learn it in terms of abstract Hilbert spaces and linear operators. Unfortunately, there's a big difference between using those things and using them rigorously. At an introductory level, there are a bunch of books like Shankar, Miller, Zetilli, and Griffiths. These books use the Hilbert space formalism, but tend to sweep a lot of technicalities (like delta functions) under the rug or hand-wave them away. If you want to get a little more rigorous after reading that level of book, Ballentine (particularly chapter 1) seems to be a good way to go. Unfortunately (or fortunately), Ballentine just sort of points you in the right direction and doesn't really get into the details of spectral theory. I think the books by Galindo and Pascual are a little more rigorous, but probably similar to Ballentine. If you want to be really rigorous, you'll need to learn some functional analysis from proper math books (e.g., Kreyszig for introductory and the series by Reed and Simon for more topics you'll need), and you'll probably want to learn about Rigged Hilbert Spaces (the thesis of de la Madrid is pretty good; also, the original sequence of books on generalized functions by Gelfand is still one of the best references on the subject).

As you can probably tell, I went down this rabbit hole myself a while ago. To make quantum mechanics very rigorous is actually quite difficult if you're not a math major. You end up having to learn a very long sequence of difficult concepts. (And that's not even getting into the group theory stuff or quantum field theory, neither of which I'm very familiar with). Part of the problem is that you start getting to a point where all the references are written by mathematicians for mathematicians, and they get very difficult to read if you don't have training as a mathematician. I've pretty much given up at this point, and I just trust that someone has proved that the things we do actually work.
 
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If this is your first time tackling QM I would definitely go with Griffiths. When you say "mathematically rigorous" I take it that you don't want to go digging around in the joyous land of Functional Calculus and infinite dimensional vector spaces since that kind of thing tends to be best handled AFTER you've already got a grip on how to do basic QM (wave mechanics and Schrödinger Equation).
Griffiths is an excellent pedagogue and you will quickly learn the rudiments and techniques applicable at your level. You can then progress to something like Liboff, Eisberg and Resnick or Brandsen and Joachain - these will all give you a broader range of quantum mechanical systems to attack. You will also learn Dirac notation.

Once you're pretty in depth hit J.J Sakurai's "Modern Quantum Mechanics". This will give you a proper algebraic and rigorous treatment. However if you've never done QM it will make no sense to you unless you've done a maths degree with a significant component of the relevant material.
 
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