Linear operators, Hermitian operators, and eigenvalue equations.
Unfortunately, I couldn't find a direct link to the PDF version of the book. However, you can try searching for the book on online libraries, such as: quantum mechanics g aruldhas pdf
: The uncertainty principle, wave packets, and both time-dependent and time-independent Schrödinger equations Advanced Formalism He revisits Fourier transforms, delta functions, and matrix
Spherical harmonics, the rigid rotator, and a thorough analysis of the Hydrogen atom. 5. Angular Momentum and Spin after wrestling with his problems
Because real physical systems rarely have exact solutions, the book dedicates significant space to approximation techniques:
Many quantum texts (like Sakurai's Modern Quantum Mechanics ) assume a heavy background in linear algebra and advanced calculus from the first page. Aruldhas starts slower. He revisits Fourier transforms, delta functions, and matrix algebra before wielding them ruthlessly. This is a lifesaver for students from universities where mathematics and physics courses are not perfectly synchronized.
The book’s author, (formerly of University of Kerala), rarely gives interviews. He belongs to a generation of Indian physicists who valued clarity over celebrity. His legacy is not a Nobel Prize or a sweeping theory—it is the quiet confidence of a student who, after wrestling with his problems, finally says, “Oh, I can actually do quantum mechanics.”