Semiclassical Nonadiabatic Molecular Dynamics
Author | : Chaoyuan Zhu |
Publisher | : Springer Nature |
Total Pages | : 280 |
Release | : |
Genre | : |
ISBN | : 981974296X |
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Author | : Chaoyuan Zhu |
Publisher | : Springer Nature |
Total Pages | : 280 |
Release | : |
Genre | : |
ISBN | : 981974296X |
Author | : Chaoyuan Zhu |
Publisher | : Springer |
Total Pages | : 0 |
Release | : 2024-09-11 |
Genre | : Science |
ISBN | : 9789819742950 |
This book shows how to derive the simple and accurate semiclassical methods analytically and its applications to excited-state molecular dynamics and spectroscopy simulation with and without classical trajectories. It consists of eight chapters demonstrating interesting conical and intersystem-driven photochemical processes in complex systems targeting on large-scale ab initio direct nonadiabatic molecular dynamics. It also includes two chapters dealing with time-independent and time-dependent nonadiabatic molecular dynamics and clarifies the underline principle of Born–Oppenheimer approximation associated with coherence/decoherence quantum effects that have a wide range of applications in photochemistry and photophysics. This book is interesting and useful to a wide readership in the various fields of basic quantum chemistry and physics associated with large-scale excited-state simulation of nonadiabatic molecular dynamics and spectroscopy.
Author | : Chaoyuan Zhu |
Publisher | : CRC Press |
Total Pages | : 520 |
Release | : 2022-12-29 |
Genre | : Science |
ISBN | : 1000647072 |
In recent decades, time-dependent density functional theory has been developed for computing excited-state properties of large-scale systems to high accuracy in biomolecules and nanomaterials, especially for ab initio nonadiabatic molecular dynamic simulations. It is therefore regarded as a most unique efficient method to do accurate simulation for large complex systems. This book compiles and details cutting-edge research in quantum chemistry and chemical physics from interdisciplinary groups from Japan, China, South Korea, the United States, Hong Kong, and Taiwan. These groups are developing excited-state dynamics methods involving conical intersections and intersystem crossings for large complex systems. Edited by Chaoyuan Zhu, a prominent chemical physics researcher, this book will appeal to anyone involved in molecular dynamics and spectroscopy, photochemistry, biochemistry, and materials chemistry research.
Author | : |
Publisher | : |
Total Pages | : |
Release | : 2015 |
Genre | : |
ISBN | : |
Non-adiabatic dynamics, where systems non-radiatively transition between electronic states, plays a crucial role in many photo-physical processes, such as fluorescence, phosphorescence, and photoisomerization. Methods for the simulation of non-adiabatic dynamics are typically either numerically impractical, highly complex, or based on approximations which can result in failure for even simple systems. Recently, the Semiclassical Monte Carlo (SCMC) approach was developed in an attempt to combine the accuracy of rigorous semiclassical methods with the efficiency and simplicity of widely used surface hopping methods. However, while SCMC was found to be more efficient than other semiclassical methods, it is not yet as efficient as is needed to be used for large molecular systems. Here, we have developed two new methods: the accelerated-SCMC and the accelerated-SCMC with re-Gaussianization, which reduce the cost of the SCMC algorithm up to two orders of magnitude for certain systems. In many cases shown here, the new procedures are nearly as efficient as the commonly used surface hopping schemes, with little to no loss of accuracy. This implies that these modified SCMC algorithms will be of practical numerical solutions for simulating non-adiabatic dynamics in realistic molecular systems.
Author | : Hiroki Nakamura |
Publisher | : World Scientific Publishing Company |
Total Pages | : 0 |
Release | : 2024-11-30 |
Genre | : Science |
ISBN | : 9789811266348 |
Various quantum mechanical effects such as nonadiabatic transition, tunneling, and interference phenomena play crucial roles in chemical and biological systems. Semiclassical molecular dynamics is an attempt to properly treat these effects in computational simulations, and this book presents and explains how this may be achieved with the use of new methods and theoretical frameworks developed by the authors. This semiclassical approach could provide a powerful step forward to tackle and clarify the quantum dynamics in large chemical and biological systems, which is currently not feasible by the full quantum mechanical methods.
Author | : Leticia González |
Publisher | : John Wiley & Sons |
Total Pages | : 52 |
Release | : 2021-02-01 |
Genre | : Science |
ISBN | : 1119417759 |
An introduction to the rapidly evolving methodology of electronic excited states For academic researchers, postdocs, graduate and undergraduate students, Quantum Chemistry and Dynamics of Excited States: Methods and Applications reports the most updated and accurate theoretical techniques to treat electronic excited states. From methods to deal with stationary calculations through time-dependent simulations of molecular systems, this book serves as a guide for beginners in the field and knowledge seekers alike. Taking into account the most recent theory developments and representative applications, it also covers the often-overlooked gap between theoretical and computational chemistry. An excellent reference for both researchers and students, Excited States provides essential knowledge on quantum chemistry, an in-depth overview of the latest developments, and theoretical techniques around the properties and nonadiabatic dynamics of chemical systems. Readers will learn: ● Essential theoretical techniques to describe the properties and dynamics of chemical systems ● Electronic Structure methods for stationary calculations ● Methods for electronic excited states from both a quantum chemical and time-dependent point of view ● A breakdown of the most recent developments in the past 30 years For those searching for a better understanding of excited states as they relate to chemistry, biochemistry, industrial chemistry, and beyond, Quantum Chemistry and Dynamics of Excited States provides a solid education in the necessary foundations and important theories of excited states in photochemistry and ultrafast phenomena.
Author | : Donald Leo Thompson |
Publisher | : World Scientific |
Total Pages | : 764 |
Release | : 1998 |
Genre | : Science |
ISBN | : 9789810233426 |
This volume describes many of the key practical theoretical techniques that have been developed to treat chemical dynamics problems in many-atom systems. It contains thorough treatments of fundamental theory and prescriptions for performing computations. The selection of methods, ranging from gas phase bimolecular reactions to complex processes in condensed phases, reflects the breadth of the field.The book is an excellent reference for proven and accepted methods as well as for theoretical approaches that are still being developed. It is appropriate for graduate students and other ?novices? who wish to begin working in chemical dynamics as well as active researchers who wish to acquire a wider knowledge of the field.
Author | : Hiroki Nakamura |
Publisher | : World Scientific |
Total Pages | : 515 |
Release | : 2012 |
Genre | : Science |
ISBN | : 9814329789 |
Nonadiabatic transition is a highly multidisciplinary concept and phenomenon, constituting a fundamental mechanism of state and phase changes in various dynamical processes of physics, chemistry and biology, such as molecular dynamics, energy relaxation, chemical reaction, and electron and proton transfer. Control of molecular processes by laser fields is also an example of time-dependent nonadiabatic transition. In this new edition, the original chapters are updated to facilitate enhanced understanding of the concept and applications. Three new chapters OCo comprehension of nonadiabatic chemical dynamics, control of chemical dynamics, and manifestation of molecular functions OCo are also added.
Author | : Giovanni Ciccotti |
Publisher | : MDPI |
Total Pages | : 627 |
Release | : 2018-10-08 |
Genre | : Science |
ISBN | : 3906980650 |
Printed Edition of the Special Issue Published in Entropy
Author | : Hiroki Nakamura |
Publisher | : World Scientific |
Total Pages | : 515 |
Release | : 2012-01-13 |
Genre | : Science |
ISBN | : 9814462438 |
Nonadiabatic transition is a highly multidisciplinary concept and phenomenon, constituting a fundamental mechanism of state and phase changes in various dynamical processes of physics, chemistry and biology, such as molecular dynamics, energy relaxation, chemical reaction, and electron and proton transfer. Control of molecular processes by laser fields is also an example of time-dependent nonadiabatic transition.In this new edition, the original chapters are updated to facilitate enhanced understanding of the concept and applications. Three new chapters — comprehension of nonadiabatic chemical dynamics, control of chemical dynamics, and manifestation of molecular functions — are also added.