Textbook in PDF format This advanced introductory textbook offers a comprehensive approach to non-relativistic Quantum Mechanics, focusing on exact methods and mathematical techniques often overlooked in standard textbooks. Bridging the gap between foundational concepts and advanced topics, this book introduces numerous methods―some of which are entirely new―making it an invaluable resource for students and researchers alike. Key topics include open quantum systems, entanglement, and supersymmetry, providing a modern perspective on the subject. With eight in-depth chapters, it covers: Quantum Mechanics: A New Paradigm. Hilbert Space Formulation of Quantum Physics. Schrödinger Equation I. Symmetry, Angular Momentum, and Statistics. Schrödinger Equation II. Path Integrals. Quantum Entanglement. Methods, Techniques, and Approximation Schemes. Perfect for those seeking a deeper understanding of quantum mechanics beyond the basics, this textbook combines theory with practical mathematical methods to present the full scope of the subject’s complexity