Ashok Das Bücher

Focusing on the essential micro-mechanisms of particulate materials, this book explores the processes of aggregation and breakage that significantly affect macroscopic behaviors like dissolution rates and flow characteristics. It emphasizes the importance of modeling and simulation in predicting these behaviors, utilizing techniques such as population balance modeling (PBM), Monte Carlo (MC) modeling, and discrete element modeling (DEM). Through these methods, the book provides insights into the complex interactions within particulate systems crucial for various engineering and scientific applications.

Focusing on quantum field theory through the lens of path integrals, this book offers a comprehensive exploration of the subject. It begins with foundational concepts in quantum mechanics, making complex ideas accessible, and then delves into specialized areas of application across various physics fields. The unique approach emphasizes the practical utility of quantum field theory, providing readers with a deep understanding of both the theory and its implications in contemporary physics.

The book provides a comprehensive exploration of finite temperature field theory through three main formalisms: imaginary time, closed time, and thermofield dynamics. It delves into practical applications, including gauge field theories, symmetry restoration, and the relationship between zero and finite temperature Feynman graphs. Key topics include the generalization of light-front field theories, Unruh radiation, and the intricacies of effective actions and symmetries at high temperatures. Additionally, it discusses nonequilibrium phenomena and the fluctuation-dissipation theorem, supported by numerous examples and appendices for clarity.

The book presents a comprehensive compilation of lectures from a gravitation course at the University of Rochester, beginning with fundamental geometric concepts. It systematically progresses to advanced topics, including the big bang theory and a derivation of the cosmic background temperature. Detailed examples throughout the text enhance understanding, making complex ideas accessible for readers interested in the intricacies of gravitation and cosmology.

The book presents an informal and personal exploration of quantum field theory through lectures from a two-semester course. It begins with relativistic one-particle systems and progresses to fundamental concepts such as the Poincaré group and canonical quantization for various theories. Key topics include covariant quantization and BRST symmetry, the Higgs phenomenon, and the standard model of electroweak interactions. Additionally, it covers regularization and renormalization techniques, alongside discussions on Dirac quantization of constrained systems and discrete symmetries for a comprehensive understanding.

This unique book describes quantum field theory completely within the context of path integrals. With its utility in a variety of fields in physics, the subject matter is primarily developed within the context of quantum mechanics before going into specialized areas. All the existing chapters of the previous edition have been expanded for more clarity. The chapter on anomalies and the Schwinger model has been completely rewritten for better logical clarity. Two new chapters have been added at the request of students and faculty worldwide. The first describes Schwinger's proper time method with simple examples both at zero and at finite temperature while the second develops the idea of zeta function regularization with simple examples. This latest edition is a comprehensive and much expanded version of the original text.