Atanu Bhattacharya – författare

Computational spectroscopy and computational quantum chemical dynamics is a vast field in physical chemistry. Significant part of this field is developed based on the concepts of time-dependent quantum mechanics and its numerical implementations.This book gives an introduction to the Time-Dependent Quantum Chemistry for use with any introductory college/university course in optics, spectroscopy, kinetics, dynamics, or experimental physical chemistry or chemical physics of the kind usually taken by undergraduate and graduate students in physical chemistry. In this book, different concepts of time-dependent quantum mechanics are systematically presented by first giving emphasis on the contrasting viewpoint of classical and quantum mechanical motion of a particle, then by demonstrating the ways to find classical flavour in quantum dynamics, thereafter by formally defining the wavepacket which represents a quantum particle and finally by demonstrating numerical methods to explore the wavepacket dynamics in one dimension. Along with the analytical theory, accompanying Python chapters in this book take readers to a hands-on tour with Python programming by first giving them a quick introduction to the Python programming, then by introducing the position-space grid representation of the wavefunction, thereafter, by making them familiarized with the Fourier transform to represent the discretized wavefunction in momentum space, subsequently by showing the Python-based methodologies to express Hamiltonian operator in matrix form and finally by demonstrating the entire Python program which solves the wavepacket dynamics in one dimension under influence of time-independent Hamiltonian following split-operator approach.Rigorous class-testing of the presented lecture notes at the Indian Institute of Science, GITAM University and at NPTEL platform reveals that physical chemistry students, after thoroughly going through all chapters, not only develop an in-depth understanding of the wavepacket dynamics and its numerical implementations, but also start successfully writing their own Python code for solving any one dimensional wavepacket dynamics problem.

This book discusses the use of Web 2.0 tools to leverage students’ own use of New Media, which can take learning beyond the classroom. This paradigmatic book will help language educators gain a better understanding of the shift in pedagogic practices through the incorporation of technology in language learning programs. It explores the theoretical underpinnings of ICT in education, before moving on to pragmatic considerations and subsequent implementation of ICT within and beyond language classrooms in the South Asian context.The book covers a wide range of topics, such as the context within which ICT can be placed vis-à-vis teaching and learning in the digital age, as well as the role of ICT in communicative practices, and strategies used to bring these practices to the language classroom. It illustrates how ICT can be incorporated for both receptive as well as productive language learning skills, such as listening, reading, speaking, and writing within pedagogic frameworks. Accordingly, it addresses affordable technologies and how they can be made a part of the teaching–learning experience. Finally, in terms of ICT beyond the classroom, the book provides a broader perspective on ICT in terms of selecting platforms or software, as well as the evaluation of ICT with special reference to ICT policies that offer language educators guidance on managing ICT frameworks within their institutions.Given its scope, the book offers a valuable asset for language educators, teacher trainers, students, and researchers in education and linguistics programs within and outside South Asia.

The primary goal of this text book is to ensure that any physical science student, even one who has never heard of the subject, should be able to learn what ultrafast spectroscopy is, why optics related to the subject requires special attention, how to use the basic ideas of the subject in laboratory-based ultrafast spectroscopy experiments, how to interpret the experimental observations and so on. This book gives a more than adequate introduction to mathematical representation of an ultrafast pulse, chirp, time-band width product, nonlinear optical effects, dispersion effects, construction of ultrafast laser, ultrafast measurement techniques and different ultrafast processes of chemical interest.