Memory Functions, Projection Operators, and the Defect Technique

V. M. (Nitant) Kenkre is Distinguished Professor (Emeritus) of Physics at the University of New Mexico (UNM), USA, retired since 2016. His undergraduate studies were at IIT, Bombay (India) and his graduate work took place at SUNY Stony Brook (USA). He was elected Fellow of the American Physical Society in 1998, Fellow of the American Association for Advancement of Science in 2005 and has won an award from his University for his international work. He was the Director of two Centers at UNM: the Center for Advanced Studies for 4 years and then the Founding Director of the Consortium of the Americas for Interdisciplinary Science for 16 years. He was given the highest faculty research award of his University in 2004 and supervised the Ph.D. research of 25 doctoral scientists and numerous postdoctoral researchers.Through 270 published papers, his research achievements include formalistic contributions to non- equilibrium statistical mechanics, particularly quantum transport theory, observations in sensitized luminescence and exciton/electron dynamics in molecular solids, and solutions to cross-disciplinary puzzles arising in spread of epidemics, energy transfer in photosynthetic systems, statistical mechanics of granular materials, and the theory of microwave sintering of ceramics.He has interests in comparative religion, literature and visual art, and has often lectured on the first of  these. His most recent coauthored book is Theory of the Spread of Epidemics and Movement Ecology of Animals (Cambridge University Press, 2020). He has also coauthored a book on exciton dynamics (Springer, 1982), coedited another on modern challenges in statistical mechanics (AIP, 2003), and published a book on his poetry entitled Tinnitus, and two on philosophy: The Pragmatic Geeta, and What is Hinduism.

• Chapter 1. The Memory Function Formalism: What and Why.- Chapter 2. Zwanzig’s Projection Operators: How They Yield Memories.- Chapter 3. Building Coarse-Graining into Projections and Generalizing Energy Transfer Theory.- Chapter 4. Relations of Memories to Other Entities and GME Solutions for the Linear Chain.- Chapter 5. Direct Determination of Frenkel Exciton Coherence from Ronchi Ruling and Transient Grating Experiments.- Chapter 6. Application to Charges Moving in Crystals: Resolution of the Mobility Puzzle in Naphthalene and Related Results.- Chapter 7. Projections and Memories for Microscopic Treatment of Vibrational Relaxation.- Chapter 8. Projection Operators for Various Contexts.- Chapter 9. Spatial Memories and Granular Compaction.- Chapter 10. Memories and Projections in Nonlinear Equations of Motion.- Chapter 11. The Montroll Defect Technique and its Application to Molecular Crystals.- Chapter 12. The Defect Technique in the Continuum.- Chapter 13. Memory Functions fromStatic Disorder: Effective Medium Theory.- Chapter 14. Effective Medium Theory Application to Molecular Movement in Cell Membranes.- Chapter 15. A Mathematical Approach to Non-Physical Defects.- Chapter 16. Concluding Remarks.

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