I an an undergraduate in 2nd year of study and doing an internship this summer on Quantum information Processing and related concepts. Since I had very less exposure to Quantum mechanics I was suggested to read R. Shankar's "Principles of Quantum Mechanics". I am currently following the book . I am also asked to study about Density matrices and Liouville-Von Neumann equation for my project work. I'd like some book recommendations on Quantum Mechanics containing the mentioned topics . I was unable to find them on a Google search.
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I followed the book Quantum Computation and Quantum Information by Michael A. Nielsen and Isaac L. Chuang for a Quantum Information course and found it clear and providing good physical insight. I think it is quite self-contained and in the firsts chapters it provides an overview of Quantum Mechanics to understand Quantum Information. (In particular, it covers Density matrices too.)