Coherent destruction of tunneling with optimally designed polychromatic external field

Ghosh, Subhasree; Talukder, Srijeeta; Sen, Shrabani; Chaudhury, Pinaki

doi:10.1016/j.chemphys.2013.07.021

Cited by 17 publications

(19 citation statements)

References 38 publications

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“…This mechanism is now the one most generally recognized, particularly with respect to processes in biological systems [54,55]. The approach developed in [2,25] for considering the temperature dependence of the rate constant of tunneling reactions has been used in the scientific literature ever since the early 1980s [56][57][58][59].…”

Section: Tunneling Transfer Of Atomic Particles In Chemical and Biolomentioning

confidence: 99%

Tunneling transfer of atomic particles in chemical and biological reactions: The role of intermolecular vibrations and media reorganization

Трахтенберг

2014

Russ. J. Phys. Chem.

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Various types of chemical and biological tunneling reactions in a condensed phase are discussed. The analytical expressions for the rate constants in different temperature ranges are given. Experimental data on such low temperature processes as hydrogen transfer from a molecule to a radical between two molecules and intramolecular transformations are considered. Data on the kinetic isotope effect upon the transfer of atomic particles in the solid phase and biological liquids are presented. The effect pressure has on different tunneling reactions is also considered; where possible, experimental results are compared with theory.

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Section: Tunneling Transfer Of Atomic Particles In Chemical and Biolomentioning

confidence: 99%

Tunneling transfer of atomic particles in chemical and biological reactions: The role of intermolecular vibrations and media reorganization

Трахтенберг

2014

Russ. J. Phys. Chem.

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“…One of the common ways to get selective control is by the use of electromagnetic radiation. Phenomena like selective bond dissociation, dynamical localization, and photodetachment can be achieved by driving the system with optimally designed electromagnetic field. The area of this research is commonly known as optimal control theory where the electromagnetic field parameters are being optimized in order to drive a chemical event in a desired channel.…”

Section: Introductionmentioning

confidence: 99%

“…Phenomena like selective bond dissociation, dynamical localization, and photodetachment can be achieved by driving the system with optimally designed electromagnetic field. The area of this research is commonly known as optimal control theory where the electromagnetic field parameters are being optimized in order to drive a chemical event in a desired channel. It is often seen that a monochromatic field is inadequate in driving the system toward its ultimate goal but using a polychromatic field with properly chosen field parameters one can obtain the desired objective .…”

Section: Introductionmentioning

confidence: 99%

Controlling the isomerization dynamics of iodide acetonitrile dimer complex by optimally designed electromagnetic field: A wave packet based approach

Naskar

Talukder

Ghosh

2019

Int J of Quantum Chemistry

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Both symmetric and asymmetric forms of the iodide acetonitrile dimer complex are known to exist with a higher stability shown by the symmetric isomer. Dynamics of this isomerization has been investigated on reduced dimensional surface in absence/presence of external electromagnetic field using Gaussian wave packet as the starting wave function. When the symmetric isomer has been taken as the initial structure, isomerization does not takes place without the external field due to high energy barrier, whereas with the asymmetric isomer as the starting one, isomerization takes place spontaneously with an equal population of both isomers. Our target in this study has been to get a dominant population of asymmetric isomer which is not possible without the application of electromagnetic field. However, it has also been seen that a simple monochromatic field cannot achieve this goal. Only by application of optimally designed polychromatic field the dominating population of asymmetric isomer can be obtained.

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“…For multiple‐minima problems, there are no in‐built strategies in these methods which can surmount barriers separating critical points. However, methods endowed with stochasticity do not suffer from such limitations . The exploration of the PES is essentially random and not dictated by quick descent of gradient as the only guiding force.…”

Section: Introductionmentioning

confidence: 99%

Predicting stability limits for pure and doped dicationic noble gas clusters undergoing coulomb explosion: A parallel tempering based study

Ghorai

Chaudhury

2017

J Comput Chem

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We have used a replica exchange Monte-Carlo procedure, popularly known as Parallel Tempering, to study the problem of Coulomb explosion in homogeneous Ar and Xe dicationic clusters as well as mixed Ar-Xe dicationic clusters of varying sizes with different degrees of relative composition. All the clusters studied have two units of positive charges. The simulations reveal that in all the cases there is a cutoff size below which the clusters fragment. It is seen that for the case of pure Ar, the value is around 95 while that for Xe it is 55. For the mixed clusters with increasing Xe content, the cutoff limit for suppression of Coulomb explosion gradually decreases from 95 for a pure Ar to 55 for a pure Xe cluster. The hallmark of this study is this smooth progression. All the clusters are simulated using the reliable potential energy surface developed by Gay and Berne (Gay and Berne, Phys. Rev. Lett. 1982, 49, 194). For the hetero clusters, we have also discussed two different ways of charge distribution, that is one in which both positive charges are on two Xe atoms and the other where the two charges are at a Xe atom and at an Ar atom. The fragmentation patterns observed by us are such that single ionic ejections are the favored dissociating pattern. © 2017 Wiley Periodicals, Inc.

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Coherent destruction of tunneling with optimally designed polychromatic external field

Cited by 17 publications

References 38 publications

Tunneling transfer of atomic particles in chemical and biological reactions: The role of intermolecular vibrations and media reorganization

Tunneling transfer of atomic particles in chemical and biological reactions: The role of intermolecular vibrations and media reorganization

Controlling the isomerization dynamics of iodide acetonitrile dimer complex by optimally designed electromagnetic field: A wave packet based approach

Predicting stability limits for pure and doped dicationic noble gas clusters undergoing coulomb explosion: A parallel tempering based study

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