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This text addresses that issue perfectly. The introductory section on linear algebra stands by itself very well, and in my opinion is at least as good as the opening sections of Sakurai on linear algebra. It also provides a section on Hamiltonian and Lagrangian mechanics, which the reader can either skip and refer to later or read through, without really disrupting the continuity of the book.
All well and good, it sets up the background for quantum mechanics very well, but the key point is how it addresses quantum mechanics itself. And I have to say that it addresses the subject elegantly. It provides well-written sections that are actually entertaining to read, and presents each problem with the brevity it deserves. With the free particle, Shankar simply gives the propagator and procedes to the next section, which is about all that can be done for the free particle, since the energy eigenstates are not normalizeable. The treatment of the quantum harmonic oscillator is among the most complete I've ever seen, approaching it from every possible angle and devoting an entire chapter to the varied solutions.
And all this is done with a great deal of clarity. If the text comes across something you might not understand, Shankar stops and discusses it for a page, going into the physical implications of various solutions and theorems, making you feel comfortable that you actually understand the results and are not merely quoting them.
In some areas it seems like Shankar holds back on things, and if you want a little group theory in your quantum you'll have to go to another source to supplement, Sakurai comes to mind. But the Shankar can stand alone as the best overall quantum mechanics textbook I have ever read.
Shankar presents the axioms of quantum mechanics early, just after going through a self-contained introduction to the mathematics required to understand the content of the book. The only criticism I have of this book is that the motivation for the axioms seems a little weak. He then goes through all the standard subjects, eg., angular momentum, scattering theory etc. One nice feature is a very clear description of Feynman's path integral. Another great feature of this book is the inclusion of a broad selection of exercises, most of which are trivial (and hence confidence-building), but still *interesting*. There are partial solutions as well.
One of the most unexpected features of this book is that, unlike most learning books, it does not become useless once you have gone through it. At the end of the book there is a beautiful chapter on advanced topics, including, the quantum Hall effect, the Berry phase, and Feynman's path integral as applied to condensed matter physics. The small section on the integral and fractional quantum Hall effects is surely the quickest way to learn about the basic effect.
Shankar will continually reward the reader, from the moment you pick it up to learn quantum mechanics for the first time, to the point where you begin research in condensed matter physics, high energy physics, quantum information or any other branch of physics.
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