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I'm really interested in quantum theory and would like to learn all that I can about it. I've followed a few tutorials and read a few books but none satisfied me completely. I'm looking for introductions for beginners which do not depend heavily on linear algebra or calculus, or which provide a soft introduction for the requisite mathematics as they go along.

What are good introductory guides to QM along these lines?

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13 Answers 13

Introduction to Quantum Mechanics by David Griffiths, any day! Just pick up this book once and try reading it. Since you have no prior background, this is the book to start with. The most voted up answer right now has referenced books that are pretty rigorous and dense in content. Griffiths is not a cakewalk, it is just the right amount you can lift in the first go.

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The book is available here: archive.org/details/IntroductionToQuantumMechanics_718 Since it is in archive.org I suppose its legal. –  Venki 17 hours ago
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For quantum mechanics, the original is still the best:

  • Dirac's "The Principles of Quantum Mechanics".

It's clear, it's terse, and it's comprehensive. All other books take most of their material from this source.

For a basic short introduction to quantum mechanics, you can't beat:

This is very good and intuitive, and complementary to the remaining books.

  • Landau and Lifschitz "Quantum Mechanics"

is heavy on good exercizes and mathematical tools. L&L include topics not covered everywhere else. The standard undergraduate books on quantum mechanics are not very good in comparison to these, and should not be used.

A book which requires minimum of calculus or continuous mathematics is

  • Neilson & Chuang: "Quantum Computation and Quantum Information"

This focuses on modern research, and discrete systems in quantum computation. If you don't know calculus, learn it, but you might find this book the most accessible. It's long though.

On advanced quantum mechanics, there are good books are by Gottfried and by Sakurai. Berezin's book is also a great classic.

For the path integral, you can read Feynman and Hibbs, but I like Feynman's 1948 Reviews of Modern Physics article more. There is also a good book which covers the path integral:

  • Yourgrau & Mandelstam: Variational Principles in Classical and Quantum Physics.

The original source for the Fermionic path integral is still the best, in my opinion:

  • D.J. Candlin: Nuovo Cimento 4,224

If you want to convince youself quantum mechanics is necessary, you should recapitulate the historical development. For this, the following source is good:

  • Ter Haar's "The Old Quantum Theory" (it's short) to learn Bohr Sommerfeld quantization

You can also read the Wikipedia page on old quantum theory for a sketchy summary, then look at the page on matrix mechanics. This explains the intuition Heisenberg had about matrix elements, something which is not in Dirac's book or anywhere else. Heisenberg's reasoning is also found to certain extent in the first chapters of this book:

  • Connes "Noncommutative geometry".

This book is also very interesting for other reasons.

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Ooph, this answer is way of base, except possibly for Feynman's book which is likeable. For a beginner, basic math and beginner textbooks like Griffiths' are much better to recommend. –  Ján Lalinský May 30 at 17:07
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OK. First, you need a some comfort in Linear Algebra. Go to the MIT Open Courseware site and watch the Linear Algebra lecture (videos) by Strang. These are great.

Next, watch the "Theorectical Minimum" videos by Leonard Susskind . They represent the theoretical minimum that you need to know about quantum mechanics. (i.e. the title of the video course is theoretical minimum, but it is in fact a course on quantum mechanics. Susskind is a great teacher and the videos are great. You can access them on itunes and You Tube. Search for Susskind lectures quantum mechanic from Stanford. They are just released (a few weeks ago)

Finally, the text you want is Principles of Quantum Mechanics by Shankar (he is from Harvard). He is also a great teacher. He does have some video lectures on general physics, but he does not have a video lecture on Quantum Mechanics. Nonetheless, his book is a great book for learning. It is about $70, but if you google around (with PDF in your google search) you may get lucky.

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I second the linear algebra comment. When I took graduate Quantum in the Chemistry department at Chicago (decades ago) linear algebra was not a pre-req. Those who had had it thought the QM class (taught by surface chemist Robert Gomer) was one of the greatest ever. Those without linear algebra thought the class sucked. –  hyperpolarizer Jul 10 at 23:55
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I think, perhaps with all the above book recommendations you could also try following a proper online quantum mechanics course. I know two such excellent courses that might be of interest.

1) Quantum Physics by V.Balakrishnan. The instructor introduces all the basics of linear algebra you need, But you will have to work very hard On your own because he will also introduce a lot of other fancy math that you might need(for instance he will speak about L^2- spaces.) I do not know a proper book that goes along with the course (Other's might recommend that)

NOTE: I checked out R.Shankar's Book "Principal's of quantum mechanics". It goes pretty well with the above online course.

2) Quantum Physics By JJ Binney. This is also a very nice introductory course taught to undergraduate students at Oxford. This might be something that will help you a lot. The book that goes along with the course is also available by the same author (free of cost) here.

3) Although there are tons of lecture notes available online. I found this to be extremely useful.

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2) Quantum Physics By JJ Binney (youtube.com/watch?v=AufmV0P6mA0&list=PLE73AA240E8655D16) This is also a very nice introductory course taught to undergraduate students at Oxford. This might be something that will help you a lot. The book that goes along with the course is also available by the same author (Free of cost) here(www-thphys.physics.ox.ac.uk/people/JamesBinney/QBhome.htm) –  user25217 Jun 3 '13 at 15:48
    
3) Although there are tons of lecture notes available online. I found this to be extremely useful (farside.ph.utexas.edu/teaching/qmech/Quantum/Quantum.html) –  user25217 Jun 3 '13 at 15:50
    
But the site requires me to have a reputation of more than 10 to post two links on the same answer. So, can't help it. –  user25217 Jun 3 '13 at 15:53
    
Oh forgot about that thanks. I'll make the edit myself. –  PhaDaPhunk Jun 3 '13 at 15:54
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For the begining you can start with Quantum Mechanics for Engineers - Leon van Dommelen, its available freely on the author's site:

http://www.eng.fsu.edu/~dommelen/quantum/style_a/index.html

Let the author speak for himself:

Here you will find the same story as physicists tell there own students. The difference is that this book is designed to be much easier to read and understand than comparable texts. Quantum mechanics is inherently mathematical, and this book explains it fully. But the mathematics is only covered to the extent that it provides insight in quantum mechanics. This is not a book for developing your skills in clever mathematical manipul­ations that have absolutely nothing to do with physical under­standing. You can find many other texts like that already, if that is your goal.

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If you're new to this, start with University Physics by Young and Freedman. The reason is that this book discusses the concepts without the rigorous math.

Study the following chapters:

Chapter 38 Photons: Light Waves Behaving as Particles Chapter 39 Particles Behaving as Waves Chapter 40 Quantum Mechanics Chapter 41 Atomic Structure

Chapters 38 and 39 give you background of early quantum theory. Chapter 40 and 41 discusses quantum mechanics.

You can also read Feynman Lectures Volume 3 to grasp the concepts without heavy math.

If you want to dig deeper, you have to study linear/matrix algebra and calculus. Afterwards, read Introduction to Quantum Mechanics by David Griffiths or Richard Liboff.

Then if you want more, read Modern Quantum Mechanics by J.J. Sakurai.

That's how I suggest you do it. Quantum Mechanics is, unfortunately, on of the more difficult physics subjects. You have to build you knowledge from easier texts or else you will get lost.

Watching lectures is also an option. Stanford and Oxford uploaded their QM lectures in Youtube. Then again, you have to know calculus and linear algebra to be able to keep up with the lectures.

Cheers!

Berty

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Feynman's Six Easy Pieces is an excellent introduction to quantum mechanics. For a more thorough analysis (and some philosophical ruminations), I'd recommend The Dancing Wu Li Masters by Gary Zukav. For an easy-to-understand discussion of the weirdness of quantum mechanics, Fred Kuttner and Bruce Rosenblum's Quantum Enigma: Physics Encounters Consciousness is excellent.

Here's an Amazon list I put together with some books I've found helpful.

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I don't know why this book I am going to recommend is completely out of print and almost forgotten. I discovered it when I was a beginning undergraduate. It is extremely useful and clear, introducing a lot of topics (even some nuclear and particle physics), and yet it is very small:

Introduction to Quantum Mechanics, by Paul Taunton Matthews, 1974, McGraw-Hill

After it, I could jump to Sakurai's Modern Quantum Mechanics and other standard 'big' books.

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I would suggest "Quantum physics of atoms, molecules, solids, nuclei, and particles" by Robert Martin Eisberg, Robert Resnick, if you want to have very good understanding without sophisticated mathematics. With emphasis on applications ,the authors discussed every topics with physical insigth, without much more mathematics (but need to know some basic calculus).The book explains you how microspcoic world works.

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Quantum Mechanics in Simple Matrix Form: [Amazon link]

No calculus is found in this book. All concepts in linear algebra are introduced. Unfortunately, this means you won't encounter stuff like the Schrodinger equation. You will have a much better than PBS understanding of quantum mechanics (what is quantum state, how you can add states, probability in quantum mech, etc.). Lightweight and cheap!

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I am a great fan of Albert Messiah, 'Quantum Mechanics', now available (two volumes bound as one) in a sturdy paperback from Dover, at reasonable cost.

Don't know why this has dropped out of fashion-- people complain it is too much oriented towards nuclear physics. Well I am a physical biochemist turned magnetic resonance jock, and I find it excellently adapted to my needs.

The problem here is that there are no easy good books. The subject is intrinsically hard. Earlier responders cited Landau and Dirac; Landau is another favorite of mine, but harder than granite-- Dirac is brilliant but legendary for difficulty. Reading Dirac is like trying to climb a sheer marble wall-- footholds and handholds are not abundant. Landau (at least) often gives a good physical reason why such and such thing should be so, before he starts writing equations. Be prepared to spend much time meditating on his meaning.

Good luck.

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As an afterthought-- years back there were some introductory books from the 'Berkeley Physics Course' and the comparable effort from MIT. The MIT book was by A. P. French-- don't remember the Berkeley author. –  hyperpolarizer Jul 11 at 0:10
    
Of course there is also the Feynman lectures volume, but I would greatly disrecommend it until you are well over several humps in the subject. The stuff on identity of particles is particularly confusing for newbies. –  hyperpolarizer Jul 11 at 0:11
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There is an excellent book called "The Road to Reality" by Roger Penrose. It is an interesting mix, being written in a conversational, easy going and accessible way, with brilliant and insightful descriptions from a real master of the craft. However, it does not skimp on the mathematics. If you are serious about exploring quantum mechanics, and fundamental physics more generally, this great place to look. It is a fun, though not so easy, ride.

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It's not n introductory book to learn Quantum Mechanics but is a blog based on an introductory book to learn Quantum Mechanics. The author is going through Introduction to Quantum Mechanics by Griffiths and is taking the time to explain the concepts and solve the exercises.

The blog in question is The Quantum Gang.

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